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:                                               
                                                                               
    Restatement of historic interest in compliance with the FSA's Disclosure   
    and Transparency Rules                                                     
                                                                               
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 1,694,567*                              
    BT Globenet Nominees Limited           6,100*                              
    Chase GA Group Nominees Limited    3,816,897*                              
    Chase Nominees Limited               230,716*                              
    CUIM Nominee Limited               1,361,930*                              
                                                                               
     * denotes direct interest                                                 
                                                                               
5.  Date of the transaction (and date on which the threshold is crossed or     
    reached if different):                                                     
                                                                               
    N/A                                                                        
                                                                               
6.  Date on which issuer notified:                                             
                                                                               
    8 March 2007                                                               
                                                                               
7.  Threshold(s) that is/are crossed or reached:                               
                                                                               
    N/A                                                                        
                                                                               
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: N/A                                                      
                                                                               
    Number of voting rights: N/A                                               
                                                                               
    Resulting situation after the triggering transaction:                      
                                                                               
    Number of shares (direct): 7,110,210                                       
                                                                               
    Number of voting rights (direct): 7,110,210                                
                                                                               
    Number of voting rights (indirect): Not disclosable                        
                                                                               
    % of voting rights (direct): 3.24%                                         
                                                                               
    % of voting rights (indirect): Not disclosable                             
                                                                               
    Total voting rights: 7,110,210 shares (3.24%)                              
                                                                               
9.  Chain of controlled undertakings through which the voting rights and/or the
    financial instruments are effectively held if applicable:                  
                                                                               
    See Section 4                                                              
                                                                               
    PROXY VOTING:                                                              
                                                                               
10. Name of the proxy holder:                                                  
                                                                               
    See Section 4                                                              
                                                                               
11. Number of voting rights proxy holder will cease to hold:                   
                                                                               
    N/A                                                                        
                                                                               
12. Date on which proxy holder will cease to hold voting rights:               
                                                                               
    N/A                                                                        
                                                                               
13. Additional Information                                                     
                                                                               
    Figures based on a total number of voting rights of 219,428,912            
                                                                               
14. Contact Name:                                                              
                                                                               
    Angela Purtill, Assistant Company Secretary, Johnson Matthey plc           
                                                                               
15. Contact Telephone Number:                                                  
                                                                               
    020 7269 8461