Director/PDMR Shareholding

NOTIFICATION OF TRANSACTIONS OF DIRECTORS, PERSONS DISCHARGING MANAGERIAL RESPONSIBILITY OR CONNECTED PERSONS

Mr. Richard Barrett a person discharging managerial responsibilities of WS Atkins plc (the "Company"), notified the Company on 12 February 2013, that on 11 February 2013 in London he acquired and then sold 29,347 ordinary shares of 0.5 pence each in the Company following the exercise of nil cost options awarded under the Atkins Deferred Share Plan, the Atkins Deferred Bonus Plan and the Atkins Long Term Incentive Plan. The share price at which Mr. Barrett exercised and sold his shares was £8.315 per ordinary share. The acquisition of 29,347 ordinary shares equated to 0.029% of the voting issued share capital.

Mr. Richard Barrett's total interest in shares following this notification is 10,200 ordinary shares, representing 0.01% of the voting issued share capital of WS Atkins plc.

This notice is given in fulfillment of the obligations under DTR 3.1.4R (1).

Carlie Nathan

Company Secretary Administrator

Telephone: +44 (0) 1372 752127

12 February 2013