Holding(s) in Company

NOTIFICATION OF MAJOR INTERESTS IN SHARES

1.    Identity of the issuer or the underlying issuer of existing shares to     
      which voting rights are attached:                                         
                                                                                
      Johnson Matthey plc                                                       
                                                                                
2.    Reason for the notification:                                              
                                                                                
      An acquisition or disposal of voting rights                               
                                                                                
3.    Full name of person(s) subject to the notification obligation:            
                                                                                
      Aviva plc and its subsidiaries                                            
                                                                                
4.    Full name of shareholder(s) (if different from 3.):                       
                                                                                
      BNY Norwich Union Nominees Limited     2,024,197*                                       
      BT Globenet Nominees Limited               5,850*                                  
      Chase GA Group Nominees Limited        4,858,385*                              
      Chase Nominees Limited                   510,017*                                  
      CUIM Nominee Limited                   1,716,465*                                   
      Tridos SICAV IValues Equity Fund           4,500*                                     
      Vidacos Nominees Limited                  21,730*                                
      Chase Nominees Limited                   453,414                            
      CUIM Nominee Limited                     368,106                            
      State Street Nominees Limited            676,082                            
      Tridos Meerwaarde Aandelen Fonds          50,000                             
      Tridos Meerwaarde Mixfonds                 8,000                                         
      Vidacos Nominees Limited                 774,483                                
      BNP Paribas - London                      77,822                             
      White Rose Nominees Limited                3,380                          
      RC Greig Nominees Limited                  1,300                             
                                                                                
      * denotes direct interest                                                 
                                                                                
5.    Date of the transaction (and date on which the threshold is crossed or    
      reached if different):                                                    
                                                                                
      13 November 2007                                                          
                                                                                
6.    Date on which issuer notified:                                            
                                                                                
      14 November 2007                                                          
                                                                                
7.    Threshold(s) that is/are crossed or reached:                              
                                                                                
      4% to 5% change at combined interest level                                
                                                                                
8.    Notified details:                                                         
                                                                                
      VOTING RIGHTS ATTACHED TO SHARES:                                         
                                                                                
      Class/type of shares (if possible using the ISIN CODE):                   
                                                                                
      GB0004764071                                                              
                                                                                
      Situation previous to the triggering transaction:                         
                                                                                
      Number of shares: 7,110,210                                               
                                                                                
      Number of voting rights: 7,110,210                                        
                                                                                
      Resulting situation after the triggering transaction:                     
                                                                                
      Number of shares (direct): 9,141,144                                      
                                                                                
      Number of voting rights (direct): 9,141,144                               
                                                                                
      Number of voting rights (indirect): 2,412,587                             
                                                                                
      % of voting rights (direct): 4.26%                                        
                                                                                
      % of voting rights (indirect): 1.12%                                      
                                                                                
      Total voting rights: 11,553,731 shares (5.38%)                            
                                                                                
9.    Chain of controlled undertakings through which the voting rights and/or   
      the financial instruments are effectively held if applicable:             
                                                                                
      See section 4                                                             
                                                                                
10.   Name of the proxy holder:                                                 
                                                                                
      See section 4                                                             
                                                                                
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                                                    
                                                                                
14.   Contact Name:                                                             
                                                                                
15.   Angela Purtill, Assistant Company Secretary, Johnson Matthey plc          
                                                                                
      Contact Telephone Number:                                                 
                                                                                
      020 7269 8461                                                             

15 November 2007