Holding(s) in Company

SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES                   

All relevant boxes should be completed in block capital letters.

1. Name of company                   2. Name of shareholder having a major     
                                        interest                               
                                                                               
   JOHN WOOD GROUP PLC                  SCHRODERS PLC                          

3. Please state whether notification 4. Name of the registered holder(s) and,  
   indicates that it is in respect      if more than one holder, the number of 
   of holding of the shareholder        shares held by each of them            
   named in 2 above or in respect of                                           
   a non-beneficial interest or in                                             
   the case of an individual holder                                            
   if it is a holding of that                                                  
   person's spouse or children under                                           
   the age of 18                                                               
                                                                               
   Non Beneficial                       SCHRODER INVESTMENT MANAGEMENT LTD     
                                        28,175,700                             
                                                                               
                                        SCHRODER INVESTMENT MANAGEMENT         
                                                                               
                                        NORTH AMERICA LTD 2,011,116            
                                                                               
                                        SCHRODER & CO LTD 135,836              

5. Number of      6. Percentage of  7. Number of shares 8. Percentage of      
   shares/amount     issued class      /amount of stock    issued class       
   of stock                            disposed                               
   acquired                                                                   
                                                                              
   Not Notified      n/a               not notified        n/a                

9. Class of security                10. Date of          11. Date company      
                                        transaction          informed          
                                                                               
   ordinary                             not notified         22 JANUARY 2007   

12. Total holding following this     13. Total percentage holding of issued    
    notification                         class following this notification     
                                                                               
    30,322,652                           5.845%                                

14. Any additional information       15. Name of contact and telephone number  
                                         for queries                           
                                                                               
    none                                 lorraine sproule (01224 851041)       

16. Name and signature of authorised company official responsible for making   
    this notification                                                          
                                                                               
    IAN JOHNSON, COMPANY SECRETARY                                             
                                                                               
Date of notification 22 JANUARY 2007