Investment Incentive Plan

ASHTEAD GROUP PLC

INVESTMENT INCENTIVE PLAN

Ashtead Group plc announces that the 221,227 and 55,305 ordinary shares
conditionally granted to Mr S I Robson and Mr S Dhaiwal respectively on 19
August 2004 under the Company's Investment Incentive Plan have today, 30 August
2007, vested unconditionally as the performance criteria attaching to the grant
have been met in full.

Following today's vesting the beneficial holdings of Mr Robson and Mr Dhaiwal
are:-

                Total number of shares    Percentage of      
                held                      issued share       
                                          capital            
                                                             
Mr Robson       812,477                   0.14%              
                                                             
Mr Dhaiwal      229,817                   0.04%              

Additionally, Mr Robson and Mr Dhaiwal conditionally hold 568,062 and 356,009
ordinary shares respectively under the Company's Performance Share Plan.