Director/PDMR Shareholding

NOTIFICATION OF TRANSACTIONS OF DIRECTORS/PERSONS DISCHARGING MANAGERIAL
RESPONSIBILITIES AND CONNECTED PERSONS

1.  Name of the issuer:                                                       
                                                                               
    Johnson Matthey plc                                                        
                                                                               
2.  State whether the notification relates to (i) a transaction notified in    
    accordance with DR 3.1.4(R)(1)(a); or (ii) DR 3.1.4 (R)(1)(b) a disclosure 
    made in accordance with section 324 (as extended by section 328) of the    
    Companies Act 1985 or (iii) both (i) and (ii):                             
                                                                               
    A M Thomson (iii)                                                          
    S Farrant (i)                                                              
                                                                              
3.  Name of person discharging managerial responsibilities/director:           
                                                                               
    A M Thomson                                                               
    S Farrant                                                                 
                                                                               
4.  State whether notification relates to a person connected with a person     
    discharging managerial responsibilities/director named in 3 and identify   
    the connected person:                                                      
                                                                               
    No                                                                        
                                                                               
5.  Indicate whether the notification is in respect of a holding of the person 
    referred to in 3 or 4 above or in respect of a non-beneficial interest:   
                                                                               
    In respect of person named in 3 above                                      
                                                                               
6.  Description of shares (including class), debentures or derivatives or      
    financial instruments relating to shares:                                   
                                                                               
    Ordinary Shares of £1 each                                                 
                                                                               
7.  Name of registered shareholders(s) and, if more than one, the number of    
    shares held by each of them:                                              
                                                                               
    A M Thomson
    S Farrant                                                              
                                                                               
8.  State the nature of the transaction:                                       
                                                                               
    Dividend Reinvestment - purchase of shares                                 
                                                                               
9.  Number of shares, debentures or financial instruments relating to shares   
    acquired:                                                                
                                                                               
    A M Thomson     31                                                         
    S Farrant       6                                                          
                                                                               
10. Percentage of issued class acquired (treasury shares of that class should  
    not be taken into account when calculating percentage):   
                 
    Less than 0.1%                                                            
                                                                               
11. Number of shares, debentures or financial instruments relating to shares   
    disposed:                                                                  
                                                                               
    N/A                                                                        
                                                                               
12. Percentage of issued class disposed (treasury shares of that class should  
    not be taken into account when calculating percentage):                    
                                                                               
    N/A                                                                        
                                                                              
13. Price per share or value of transaction:                                   
                                                                               
    £16.70                                                               
                                                                               
14. Date and place of transaction:                                             
                                                                               
    7 August 2007, London                                                     
                                                                               
15. Total holding following notification and total percentage holding following
    notification (any  treasury shares of that class should not be taken into  
    account when calculating percentage):                                      
                                                                               
    A M Thomson - 2,244                                                       
                                                                               
16. Date issuer informed of transaction:                                       
                                                                               
    7 August 2007                                                              
                                                                               
17. Date of grant:                                                             
                                                                               
    N/A                                                                        
                                                                               
18. Period during which or date on which it can be exercised:                  
                                                                               
    N/A                                                                        
                                                                               
19. Total amount paid (if any) for grant of the option:                       
                                                                               
    N/A                                                                       
                                                                               
20. Description of shares or debentures involved (class and number):           
                                                                               
    N/A                                                                       
                                                                               
21. Exercise price (if fixed at time of grant) or indication that price is to  
    be fixed at the time of exercise:                                          
                                                                               
    N/A                                                                        
                                                                               
22. Total number of shares or debentures over which options held following     
    notification:                                                             
                                                                               
    N/A                                                                        
                                                                               
23. Any additional information:                                                
                                                                               
    N/A                                                                        
                                                                               
24. Name of contact and telephone for queries                                  
                                                                               
    Angela Purtill, Assistant Company Secretary                                
    020 7269 8461                                                             
           

Name and signature of duly authorised officer of issuer responsible for making
notification

Angela Purtill

Date of Notification
7 August 2007