Blocklisting Interim Review

Name of applicant:

WS Atkins plc

Name of scheme:

WS Atkins International Sharesave Scheme

Period of return:

From:

1 January 2010

To:

30 June 2010

Balance of unallotted securities under scheme(s) from previous return:

262,423 Ordinary Shares of 0.5 pence each

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

Nil

Less: Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):

Nil

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

262,423 Ordinary Shares of 0.5 pence each

Please note that the balance of unallocated securities of 262,423 ordinary shares of 0.5 pence each which were block-listed for the WS Atkins International Sharesave Scheme will never be used for this purpose as the Scheme has now closed. It is therefore our understanding that no further announcements in relation to this block-listing are required and this will be the last announcement made.

Name of contact:

Rachel Hunter

Telephone number of contact:

+44 (0) 1372 752456