Director/PDMR Shareholding

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

Mr. Alun Hughes Griffiths, a director and person discharging managerial responsibilities of WS Atkins plc (the "Company"), notified the Company on 1 February 2011 that on 28 January 2011 in London he purchased 414 ordinary shares of 0.5 pence each in the Company at £6.975 per share pursuant to the Company's Dividend Reinvestment Plan. This equated to 0.0004% of the voting issued share capital.

Mr. Griffiths further notified the Company on 1 February 2011 that on that day in London his wife, Mrs. Mary Christine Griffiths, purchased 6 ordinary shares of 0.5 pence each in the Company at £6.975 per share pursuant to the Company's Dividend Reinvestment Plan. This equated to 0.00001% of the voting issued share capital.

Mr. Griffiths' total interest in shares following this notification is 44,191 ordinary shares, representing 0.044% of the voting issued share capital of WS Atkins plc.

Mr. Neil James Corfield Thomas, a person discharging managerial responsibilities of WS Atkins plc (the "Company"), notified the Company on 1 February 2011 that on 28 January 2011 in London he purchased 91 ordinary shares of 0.5 pence each in the Company at £6.975 per share pursuant to the Company's Dividend Reinvestment Plan. This equated to 0.0001% of the voting issued share capital.

Mr. Thomas' total interest in shares following this notification is 6,556 ordinary shares, representing 0.0065% 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

2 February 2011

Telephone: +44 (0) 1372 752456