Blocklisting - Interim Review

BLOCK LISTING SIX MONTHLY RETURN                        

Information provided on this form must be typed or printed electronically.

To: The FSA

Date: 7 December 2006

Name of applicant:                     John Wood Group PLC                     
                                                                               
Name of scheme:                        The John Wood Group PLC 1994 Approved   
                                       Executive Share Option Scheme           
                                                                               
Period of return:            From:     7 June 2006     To:    7 Dec 2006       
                                                                               
Balance under scheme from previous     848,901 shares                          
return:                                                                        
                                                                               
The amount by which the block scheme   0 shares                                
has been increased, if the scheme has                                          
been increased since the date of the                                           
last return:                                                                   
                                                                               
Number of securities issued/allotted   375,000 shares                          
under scheme during period:                                                    
                                                                               
Balance under scheme not yet issued/   473,901 shares                          
allotted at end of period                                                      
                                                                               
Number and class of securities         2,007,861 Ordinary shares - Dec 2002    
originally listed and the date of      1,819,080 Ordinary shares - June 2003   
admission                                                                      
                                                                               
Total number of securities in issue at 516,632,930                             
the end of the period                                                          

Name of contact:                        LORRAINE SPROULE                       
                                                                               
Address of contact:                     John Wood House, Greenwell Road,       
                                        Aberdeen                               
                                                                               
Telephone number of contact:            01224 851041                           

SIGNED BY _IAN JOHNSON

[DEL:Director:DEL]/company secretary/[DEL:suitably experienced:DEL] [DEL:
employee:DEL][DEL:/duly authorised officer:DEL],

for and on behalf of

JOHN WOOD GROUP PLC

Name of applicant

If you knowingly or recklessly give false or misleading information you may be
liable to prosecution.