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 DTR 3.1.2 R, (ii) a disclosure made in accordance 
          with LR 9.8.6R(1) or (iii) a disclosure made in accordance with      
          section 793 of the Companies Act (2006):                             
                                                                               
          In accordance with DTR 3.1.2R                                        
                                                                               
3.        Name of person discharging managerial responsibilities/director:     
                                                                               
          N A P Carson                                                         
          P N Hawker                                                           
          D W Morgan                                                           
          L C Pentz                                                            
          J N Sheldrick                                                        
          S Farrant                                                            
          W F Sandford                                                         
          I F Stephenson                                                       
          N Whitley                                                            
                                                                               
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 holdings of the persons 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:                                      
                                                                               
          Computershare Trustees Limited                                       
                                                                               
8.        State the nature of the transaction:                                 
                                                                               
          Monthly acquisition of shares via the Johnson Matthey Share Incentive
          Plan                                                                 
                                                                               
9.        Number of shares, debentures or financial instruments relating to    
          shares acquired:                                                     
                                                                               
          N A P Carson    21                                                   
          P N Hawker      21                                                   
          D W Morgan      21                                                   
          L C Pentz       21                                                   
          J N Sheldrick   21                                                   
          S Farrant       21                                                   
          W F Sandford    21                                                   
          I F Stephenson  21                                                   
          N Whitley       21                                                   
                                                                               
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:                             
                                                                               
          £18.71                                                               
                                                                               
14.       Date and place of transaction:                                       
                                                                               
          18 June 2008, 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):                  
                                                                               
          N A P Carson    95,767                                               
          P N Hawker      15,692                                               
          D W Morgan      40,900                                               
          L C Pentz       18,974                                               
          J N Sheldrick   97,252
                                               
16.       Date issuer informed of transaction:                                 
                                                                               
          18 June 2008                                                         
                                                                               
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

18 June 2008