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:                                                        
                                                                         
    (1) An acquisition of voting rights                                  
    (2) A disposal of voting rights                                                        
                                                                         
3.  Full name of person(s) subject to the notification obligation:
                                                                         
    Legal & General Group Plc (L&G)                                                      
                                                                         
4.  Full name of shareholder(s)(if different from 3.):                                                            
                                                                         
    Legal & General Assurance(Pensions Management)Limited (PMC)                                                        
                                                                         
5.  Date of the transaction (and date on which the threshold is crossed or reached if different):
                                                                        
    (1) 1 October 2007                                                   
    (2) 12 October 2007                                                                 
                                                                         
6.  Date on which issuer notified:                                                     
                                                                         
    (1) 4 October 2007                                                                
    (2) 15 October 2007                                                                 
                                                                         
7.  Threshold(s) that is/are crossed or reached:                                                             
                                                                         
    (1) From 3% to 4% (L&G)                                              
    (2) From 4% to 3% (L&G)                                                                
                                                                         
8.  Notified details:                                                    
                                                                         
    VOTING RIGHTS ATTACHED TO SHARES:                                                              
                                                                         
    Class/type of shares (if possible using the ISIN CODE):                                                      
                                                                         
    GB0004764071                                                         
                                                                         
    (1) Situation previous to the triggering transaction:                                                         
                                                                         
        Number of shares: 7,533,784                                      
        Number of voting rights: 7,533,784                               
        
        Resulting situation after the triggering transaction:                                                         
                                                                         
        Number of shares (direct): 8,600,608                             
        Number of voting rights (direct): 8,600,608                      
        Number of voting rights (indirect): N/A                          
        % of voting rights (direct): 4.00%                               
        % of voting rights (indirect): N/A                               
        Total voting rights: 8,600,608 (4.00%)                                                              
                                                                         
    (2) Situation previous to the triggering transaction:                                                         
                                                                         
        Number of shares: 8,600,608                                      
        Number of voting rights: 8,600,608                                                    
                                                                         
        Resulting situation after the triggering transaction:                                                         
                                                                         
        Number of shares (direct): 8,578,908                             
        Number of voting rights (direct): 8,578,908                      
        Number of voting rights (indirect): N/A                          
        % of voting rights (direct):3.99%                                
        % of voting rights (indirect): N/A                               
        Total voting rights: 8,578,908 (3.99%)                                                              
                                                                         
9.  Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively
    held if applicable:                             
                                                                         
    (1)                                                                  
                                                                         
    Legal & General Group Plc (Direct and Indirect) (Group)              
    Legal & General Investment Management (Holdings) Limited (LGIMH)(Direct and Indirect)
    Legal & General Investment Management Limited (Indirect) (LGIM)  
                                                                         
    Legal & General Group Plc (Direct) (L&G) (8,600,608 - 4.00% = LGAS, LGPL & PMC)
         Legal & General Investment Management (Holdings) Limited (Direct) (LGIMHD) (7,401,001 - 3.44%=PMC)
         Legal & General Insurance Holdings Limited (Direct) (LGIH)      
         Legal & General Assurance (Pensions Management) Limited (PMC) (7,401,001 - 3.44% = PMC)
         Legal & General Assurance Society Limited (LGAS & LGPL)       
         Legal & General Pensions Limited (Direct) (LGPL)                                                      
                                                                         
    (2)                                                                  
                                                                         
    Legal & General Group Plc (Direct and Indirect) (Group)               
    Legal & General Investment Management (Holdings) Limited (LGIMH) (Direct and Indirect)
    Legal & General Investment Management Limited (Indirect) (LGIM)
                                                                         
    Legal & General Group Plc (Direct) (L&G) (8,578,908 - 3.99% = LGAS, LGPL & PMC)
         Legal & General Investment Management (Holdings) Limited (Direct) (LGIMHD)(7,394,901 - 3.44% = PMC)
         Legal & General Insurance Holdings Limited (Direct) (LGIH)    
         Legal & General Assurance (Pensions Management) Limited (PMC)(7,394,901 - 3.44% = PMC)
         Legal & General Assurance Society Limited (LGAS & LGPL)       
         Legal & General Pensions Limited (Direct) (LGPL)   
                                                 
                                                                         
    PROXY VOTING:                                                        
                                                                         
10. Name of the proxy holder:                                                              
                                                                         
    N/A                                                                  
                                                                         
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
                                        
    (1) Notification using the total voting rights of 214,675,736

        Please note this notification has been delayed due to the large number of disclosures required
        following a substantial amount of new business which has come to us in the form of an in-specie transfer.

    (2) Notification using the total voting rights of 214,675,736

14. Contact Name:

    Angela Purtill, Assistant Company Secretary
    Johnson Matthey plc

15. Contact Telephone Number:

    020 7269 8461

16 October 2007