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:             
                                                                              
    BT Pension Scheme Trustees Limited as trustee of the BT Pension Scheme and 
    Hermes Pensions Management Limited                                         
                                                                              
4.  Full name of shareholder(s) (if different from 3.):                        
                                                                              
    N/A                                                                        
                                                                               
5.  Date of the transaction (and date on which the threshold is crossed or     
    reached if different):                                                     
                                                                              
    22 January 2007                                                            
                                                                               
6.  Date on which issuer notified:                                             
                                                                            
    24 January 2007                                                            
                                                                               
7.  Threshold(s) that is/are crossed or reached:                               
                                                                               
    3%                                                                         
                                                                               
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: 6,649,406                                                
                                                                               
    Number of voting rights: 6,649,406                                         
                                                                               
    Resulting situation after the triggering transaction:                      
                                                                               
    Number of shares (direct): 2,640,146                                       
                                                                               
    Number of voting rights (direct): 2,640,146                                
                                                                               
    Number of voting rights (indirect): 4,009,260                              
                                                                               
    % of voting rights (direct): 1.205%                                        
                                                                               
    % of voting rights (indirect): 1.830%                                      
                                                                               
    Total voting rights: 6,649,406 shares (3.035%)                             
                                                                               
9.  Chain of controlled undertakings through which the voting rights and/or the
    financial instruments are effectively held if applicable:                  
                                                                              
    BT Pension Scheme Trustees Limited is the parent undertaking of Britel Fund
    Trustees Limited, which is the parent undertaking of Hermes Pensions       
    Management Limited. Hermes Pension Management Limited is the parent        
    undertaking of:                                                            
    Hermes Equity Ownership Services Limited (voting rights held 0.044%)       
    Hermes Investment Management Limited (voting rights held 2.991%)           
    Hermes Assured Limited (included within (ii))                              
                                                                               
    Refer to Question 13 for further information.                              
                                                                               
    PROXY VOTING:                                                              
                                                                                
10. Name of the proxy holder:                                                  
                                                                               
    Refer to Question 13                                                       
                                                                              
11. Number of voting rights proxy holder will cease to hold:                   
                                                                               
    Refer to Question 13                                                       
                                                                               
12. Date on which proxy holder will cease to hold voting rights:               
                                                                               
    Refer to Question 13                                                       
                                                                               
13. Additional information:                                                    
                                                                               
    Hermes Equity Ownership Services Limited hold the voting rights under a    
    standing proxy contained in services agreements for the provision of       
    corporate governance services to various underlying clients.               
                                                                              
    Hermes Investment Management Limited hold the voting rights under a        
    standing proxy contained in investment management agreements with various  
    underlying clients, which includes all the shares owned directly by BT     
    Pension Scheme and Hermes Assured Limited.                                 
                                                                               
    All voting rights held on behalf of the above entities are aggregated for  
    the purposes of DTR 5.2.1(a). The aggregation is made at the lower         
    threshold of 3% and above because Hermes Equity Ownership Services Limited 
    does not manage investments for the purposes of the investment manager     
    exemption contained in DTR 5.1.5.                                          
                                                                              
14. Contact Name:                                                              
                                                                               
    Angela Purtill, Assistant Company Secretary, Johnson Matthey plc           
                                                                               
15. Contact Telephone Number:                                                  
   
    020 269 8461