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.):                       
                                                                                
      Registered Holder                                                         
                                                                                
      Number of Shares                                                          
                                                                                
      BNY Norwich Union Nominees Limited  2,354,035*                                                                
                                                                                
      BT Globenet Nominees Limited  5,850*                                                                    
                                                                                
      Chase GA Group Nominees Limited  5,808,393*                                                                
                                                                                
      Chase Nominees Limited  577,575*                                                                  
                                                                                
      CUIM Nominee Limited  1,984,185*                                                                
                                                                                
      Tridos SICAV I Values Equity Fund  4,500*                                                                    
                                                                                
      Vidacos Nominees Limited  21,730*                                                                   
                                                                                
      BNP Paribas - London  77,822                                                                    
                                                                                
      Chase Nominees Limited  499,107                                                                   
                                                                                
      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                                                                   
                                                                                
      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):                                                    
                                                                                
      16 November 2007                                                          
                                                                                
6.    Date on which issuer notified:                                            
                                                                                
      20 November 2007                                                          
                                                                                
7.    Threshold(s) that is/are crossed or reached:                              
                                                                                
      4% to 5% change at Direct 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: 11,553,731                                              
                                                                                
      Number of voting rights: 11,553,731                                       
                                                                                
      Resulting situation after the triggering transaction:                     
                                                                                
      Number of shares (direct): 10,756,268                                     
                                                                                
      Number of voting rights (direct): 10,756,268                              
                                                                                
      Number of voting rights (indirect): 2,458,280                             
                                                                                
      % of voting rights (direct): 5.01%                                        
                                                                                
      % of voting rights (indirect): 1.15%                                      
                                                                                
      Total voting rights: 13,214,548 shares (6.16%)                            
                                                                                
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                                                    
                                                                                
      Figures are based on a total number of voting rights of 214,675,736       
                                                                                
14.   Contact Name:                                                             
                                                                                
15.   Angela Purtill, Assistant Company Secretary, Johnson Matthey plc          
                                                                                
      Contact Telephone Number:                                                 
      020 7269 8461                                                             


20 November 2007