Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi                                         
                                                                                        

1. Identity of the issuer or the underlying issuer                                      
of existing shares to which voting rights are                                   PHSC Plc
attached:ii                                                                             
                                                                                        
2 Reason for the notification (please tick the appropriate box or boxes):               
                                                                                        
An acquisition or disposal of voting rights                                             
                                                                                        
An acquisition or disposal of qualifying financial instruments which may result         
in the acquisition of shares already issued to which voting rights are attached         
                                                                                        
An acquisition or disposal of instruments with similar economic effect to               
qualifying financial instruments                                                        
                                                                                        
An event changing the breakdown of voting rights                                       X
                                                                                        
Other (please specify):                                                                 
                                                                                        
3. Full name of person(s) subject to the                                     Downing LLP
notification obligation:iii                                                             
                                                                                        
4. Full name of shareholder(s)                                  Downing Income VCT 4 plc
 (if different from 3.):iv                                            Downing Income plc
                                                                                        
5. Date of the transaction and date on                                                  
which the threshold is crossed or                                               01/10/13
reached: v                                                                              
                                                                                        
6. Date on which issuer notified:                                               01/10/13
                                                                                        
7. Threshold(s) that is/are crossed or                                          5% to 4%
reached: vi, vii                                                                        
                                                                                        


8. Notified details:                                                                                 
                                                                                                     
A: Voting rights attached to shares viii, ix                                                         
                                                                                                     
Class/type   Situation previous            Resulting situation after the triggering transaction      
of           to the triggering                                                                       
shares       transaction                                                                             
                                                                                                     
                                                                                                     
if possible  Number          Number        Number         Number of voting       % of  voting rights 
using        of              of            of shares      rights                 x                   
the ISIN     Shares          Voting                                                                  
CODE                         Rights                                                                  
                                           Direct         Direct xi Indirect xii Direct  Indirect    
                                                                                                     
                                                                                                     
Ords 10p                                                                                             
GB0033113456 576,509         576,509       576,509                               4.54%               
                                                                                                     
                                                                                                     
                                                                                                     
B: Qualifying Financial Instruments                                                                  
                                                                                                     
Resulting situation after the triggering transaction                                                 
                                                                                                     
Type of financial   Expiration    Exercise/                Number of voting            % of voting   
instrument          date xiii     Conversion Period xiv    rights that may be          rights        
                                                           acquired if the                           
                                                           instrument is                             
                                                           exercised/ converted.                     
                                                                                                     

C: Financial Instruments with similar economic effect to Qualifying Financial                        
Instruments xv, xvi                                                                                  
                                                                                                     
Resulting situation after the triggering transaction                                                 
                                                                                                     
Type of       Exercise price Expiration   Exercise/       Number of voting rights   % of voting      
financial                    date xvii    Conversion      instrument refers to      rights xix, xx   
instrument                                period xviii                                               
                                                                                                     
                                                                                                     
                                                                                    Nominal Delta     
                                                                                                     
                                                                                                     
                                                                                                     
Total (A+B+C)                                                                                        
                                                                                                     
Number of voting rights                          Percentage of voting rights                         
                                                                                                     
576,509                                          4.54%                                               
                                                                                                     


9. Chain of controlled undertakings through which the voting rights and/or the          
financial instruments are effectively held, if applicable: xxi                          
                                                                                        
Proxy Voting:                                                                           
                                                                                        
10. Name of the proxy holder:                                                           
                                                                                        
11. Number of voting rights proxy holder will cease                                     
to hold:                                                                                
                                                                                        
12. Date on which proxy holder will cease to hold                                       
voting rights:                                                                          
                                                                                        
13. Additional information:                                            Company Secretary
                                                                                        
14. Contact name:                                                       Grant Whitehouse
                                                                                        
15. Contact telephone number:                                              0207 416 7780