Director/PDMR Shareholding

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

Mr. Alun Hughes Griffiths, a director of WS Atkins plc (the "Company"), notified the Company on 9 August 2010, that on that day in London he acquired 11,010 ordinary shares of 0.5 pence each in the Company following the exercise of nil cost options made under the Atkins Long Term Incentive Plan and the Atkins Deferred Bonus Plan. Of the 11,010 shares acquired, 5,628 shares were sold to meet a tax liability at a sale price of £7.88633 per share. The acquisition of 11,010 shares equated to 0.011% of the voting issued share capital and the 5,382 retained shares equated to 0.005% of the voting issued share capital.

Mr. Griffiths' total interest in shares following this notification is 43,547 ordinary shares, representing 0.043% 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).

Rachel Hunter

Company Secretarial Assistant

Telephone: +44 (0) 1372 752456

10 August 2010