Annual Information Update

UNITED UTILITIES PLC                                                                  
                                                                               
ANNUAL INFORMATION UPDATE 29 June 2007 - 2 July 2008 (filed via RIS within 20  
days of publication of annual financial statements)                            
                                                                               
Date of       Description of Document         Place of filing   Place where    
publication                                                     copy can be    
                                                                obtained       
                                                                               
                                                                               
                                                                               
Various       Forms 88(2) reflecting the      Companies House   Companies House
              allotment of shares as result                     website        
              of the operation of the                                          
              save-as-you-earn scheme,                                         
              performance share plan and                                       
              executive share option scheme                                    
                                                                               
28.06.07      Annual Information Update       UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
29.06.07      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
05.07.07      Holding in company - Invesco    UK Listing        LSE's and      
              4.79%                           Authority         company's      
                                                                website        
                                                                               
09.07.07      Publication of Prospectus -     UK Listing        LSE's and      
              Final Terms United Utilities    Authority         company's      
              Water PLC £100m 1.585% IL Notes                   website        
                                                                               
18.07.07      Director/PDMR share interests - UK Listing        LSE's and      
              SIP                             Authority         company's      
                                                                website        
                                                                               
24.07.07      Holding in company - Pictet     UK Listing        LSE's and      
              4.98%                           Authority         company's      
                                                                website        
                                                                               
27.07.07      AGM trading statement           UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
30.07.07      Announcement re AGM special     UK Listing        LSE's and      
              resolutions                     Authority         company's      
                                                                website        
                                                                               
30.07.07      Results of AGM poll             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
30.07.07      Director/PDMR share interests - UK Listing        LSE's and      
              CH Elphick - share sale         Authority         company's      
                                                                website        
                                                                               
30.07.07      Matching Share Plan Award       UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
30.07.07      Rule of Matching Share Plan and Financial         FSA - Document 
              new Articles of Association     Services          Viewing        
                                              Authority         Facility/      
                                                                Company's      
                                                                website        
                                                                               
31.07.07      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
31.07.07      Director/PDMR share interests - UK Listing        LSE's and      
              CH Elphick - share sale         Authority         company's      
                                                                website        
                                                                               
08.08.07      Ordinary and special            Companies House/  Companies House
              resolutions passed at AGM       UK Listing        website        
              -increase in ordinary share     Authority                        
              capital, allotment authority,                                    
              dis-application of statutory                                     
              pre-emption rights, market                                       
              purchase of its own shares by                                    
              the company, approval of the                                     
              Matching Share Plan and new                                      
              Articles of Association                                          
                                                                               
08.08.07      Holding in company - Invesco    UK Listing        LSE's and      
              5.07%                           Authority         company's      
                                                                website        
                                                                               
08.08.07      Memorandum and Articles of      Companies House   Companies House
              Association                                       website        
                                                                               
15.08.07      Increase in share capital       Companies House   Companies House
                                                                website        
                                                                               
17.08.07      Director/PDMR share interests - UK Listing        LSE's and      
              SIP                             Authority         company's      
                                                                website        
                                                                               
22.08.07      Accounts                        Companies House   Companies House
                                                                website/       
                                                                Company's      
                                                                website        
                                                                               
28.08.07      Annual Return                   Companies House   Companies House
                                                                website        
                                                                               
29.08.07      Director/PDMR share interests - UK Listing        LSE's and      
              SIP - Dividend reinvestment and Authority         company's      
              PDMR share interests                              website        
                                                                               
31.08.07      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
31.08.07      Change of name United Utilities                                  
              Electricity PLC to United                                        
              Utilities Electricity Limited                                    
                                                                               
17.09.07      Director/PDMR share interests - UK Listing        LSE's and      
              SIP                             Authority         company's      
                                                                website        
                                                                               
25.09.07      Trading Statement               UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
25.09.07      Brokership Announcement         UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
27.09.07      Resignation of Paul Capell as   UK Listing        LSE's and      
              executive director              Authority         company's      
                                                                website        
                                                                               
30.09.07      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
03.10.07      Form 288b - Resignation of Paul Companies House   Companies House
              Capell as executive director                      website        
                                                                               
08.10.07      Holding in company - Legal &    UK Listing        LSE's and      
              General 4.02%                   Authority         company's      
                                                                website        
                                                                               
17.10.07      Director/PDMR share interests - UK Listing        LSE's and      
              SIP                             Authority         company's      
                                                                website        
                                                                               
31.10.07      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
16.11.07      Publication of Final Terms      UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
19.11.07      Publication of Final Terms      UK Listing        LSE's and      
              (Amended)                       Authority         company's      
                                                                website        
                                                                               
19.11.07      Executed Final Terms UUW 1.66%  UK Listing        LSE's and      
              35m IL Notes due 2037           Authority         company's      
                                                                website        
                                                                               
21.11.07      Director/PDMR share interests - UK Listing        LSE's and      
              SIP                             Authority         company's      
                                                                website        
                                                                               
23.11.07      Sale of United Utilities        UK Listing        LSE's and      
              Electricity Limited             Authority         company's      
                                                                website        
                                                                               
29.11.07      Half year 0708 Announcement     UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
29.11.07      Interim Announcement            UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
30.11.07      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
06.12.07      Publication of Prospectus       UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
06.12.07      Supplemental Prospectus         UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
07.12.07      Director/PDMR share interests - UK Listing        LSE's and      
              MF Bradbury - executive option  Authority         company's      
              exercise and sale                                 website        
                                                                               
14.12.07      Director/PDMR share interests - UK Listing        LSE's and      
              Performance Share Plan Award to Authority         company's      
              Tom Keevil                                        website        
                                                                               
18.12.07      Director/PDMR share interests - UK Listing        LSE's and      
              SIP                             Authority         company's      
                                                                website        
                                                                               
19.12.07      Completion of sale of           UK Listing        LSE's and      
              Electricity Assets              Authority         company's      
                                                                website        
                                                                               
27.11.07      Interim Accounts                Companies House   Companies House
                                                                website        
                                                                               
03.12.07      Resignation of Paul Davies as   UK Listing        LSE's and      
              secretary                       Authority         company's      
                                                                website        
                                                                               
03.12.07      Appointment of Tom Keevil as    UK Listing        LSE's and      
              secretary                       Authority         company's      
                                                                website        
                                                                               
06.12.07      288b - Resignation of Paul      Companies House   Companies House
              Davies as secretary                               website        
                                                                               
06.12.07      288a - Appointment of Tom       Companies House   Companies House
              Keevil as secretary                               website        
                                                                               
31.12.07      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
09.01.08      Key Dates                       UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
17.01.08      Director/PDMR share interests - UK Listing        LSE's and      
              SIP                             Authority         company's      
                                                                website        
                                                                               
25.01.08      Extension to metering contract  UK Listing        LSE's and      
              with British Gas Trading        Authority         company's      
              Limited to 2010                                   website        
                                                                               
30.01.08      Interim Management Statement    UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
31.01.08      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
04.02.08      Appointment of non-executive    UK Listing        LSE's and      
              director - Dr John McAdam       Authority         company's      
                                                                website        
                                                                               
05.02.08      288a - appointment of Dr John   Companies House   Companies House
              McAdam as non-executive                           website        
              director                                                         
                                                                               
12.02.08      Director/PDMR share interests - UK Listing        LSE's and      
              Dividend Reinvestment within    Authority         company's      
              share plans                                       website        
                                                                               
18.02.08      Holding in company - Pictet     UK Listing        LSE's and      
              5.06%                           Authority         company's      
                                                                website        
                                                                               
19.02.08      Dr John McAdam - appointment as UK Listing        LSE's and      
              non-executive director of Rolls Authority         company's      
              Royce plc                                         website        
                                                                               
18.02.08      Director/PDMR share interests - UK Listing        LSE's and      
              SIP                             Authority         company's      
                                                                website        
                                                                               
26.02.08      Appointment of Paul Heiden as   UK Listing        LSE's and      
              Chairman of the Audit Committee Authority         company's      
                                                                website        
                                                                               
29.02.08      Investor Presentation           UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
29.02.08      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
03.03.08      Director/PDMR share interests - UK Listing        LSE's and      
              CH Elphick - SAYE Exercise      Authority         company's      
                                                                website        
                                                                               
03.03.08      Director/PDMR share interests - UK Listing        LSE's and      
              MF Bradbury - SAYE Exercise     Authority         company's      
                                                                website        
                                                                               
07.03.08      Director/PDMR share interests - UK Listing        LSE's and      
              TS Keevil (Mrs G Keevil) -      Authority         company's      
              Share Purchase                                    website        
                                                                               
13.03.08      Charlie Cornish appointed as    UK Listing        LSE's and      
              MD, Business Development and    Authority         company's      
              International                                     website        
                                                                               
17.03.08      Director/PDMR share interests - UK Listing        LSE's and      
              SIP                             Authority         company's      
                                                                website        
                                                                               
20.03.08      Dr John McAdam - appointment as UK Listing        LSE's and      
              Chairman of Rentokil with       Authority         company's      
              effect from 14 May 2008                           website        
                                                                               
26.03.08      Director/PDMR share interests - UK Listing        LSE's and      
              MF Bradbury and Mrs J Bradbury  Authority         company's      
              - Share sale                                      website        
                                                                               
26.03.08      Trading Statement               UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
31.03.08      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
07.04.08      Director/PDMR share interests - UK Listing        LSE's and      
              SIP                             Authority         company's      
                                                                website        
                                                                               
30.04.08      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
07.05.08      Contract extension with         UK Listing        LSE's and      
              Southern Water                  Authority         company's      
                                                                website        
                                                                               
20.05.08      Director/PDMR share interests - UK Listing        LSE's and      
              SIP                             Authority         company's      
                                                                website        
                                                                               
30.05.08      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
03.06.08      Preliminary announcement of     UK Listing        LSE's and      
              results                         Authority         company's      
                                                                website        
                                                                               
06.06.08      Publication of prospectus and   UK Listing        LSE's and      
              circular                        Authority         company's      
                                                                website        
                                                                               
06.06.08      Holding in company - Pictet     UK Listing        LSE's and      
              5.00%                           Authority         company's      
                                                                website        
                                                                               
18.06.08      Director/PDMR share interests - UK Listing        LSE's and      
              SIP                             Authority         company's      
                                                                website        
                                                                               
27.06.08      Accounts available at Document  UK Listing        LSE's and      
              viewing facility                Authority         company's      
                                                                website        
                                                                               
30.06.08      Total voting rights             UK Listing        LSE's and      
                                              Authority         company's      
                                                                website        
                                                                               
01.07.08      Poll result of Court & General  UK Listing        LSE's and      
              Meeting                         Authority         company's      
                                                                website        
                                                                               
01.07.08      Resolutions passed at Court and UK Listing        LSE's and      
              General Meeting                 Authority         company's      
                                                                website        
                                                                               
02.07.08      Resolutions passed at Court and Companies House   Companies House
              General Meeting                                   website        
                                                                               
02.07.08      Annual Information Update       UK Listing        LSE's and      
                                              Authority         company's      
                                                                website