Appointment of Chairman Designate

6 April 2016

COSTAIN GROUP PLC

("Costain" or "the Group")

APPOINTMENT OF CHAIRMAN-DESIGNATE

Costain, the engineering solutions provider, announces that Dr Paul Golby CBE FREng will join the Board and succeed David Allvey as Chairman with effect from the close of the Annual General Meeting on 5 May 2016. David Allvey will step down from the Board at the same time.Paul is Chairman of NATS Holdings Limited and a Non-Executive Director of National Grid plc and was formerly Chairman of AEA Technology Group plc.

Following an early career across various managerial roles at Dunlop Holdings plc, BTR plc and Clayhithe plc, Paul spent thirteen years at E.ON UK plc (formerly PowerGen plc) including nine as Chief Executive, during which time he oversaw the transformation of the company from the smallest UK player into one of the country's leading integrated electricity and gas businesses.

Paul graduated in Mechanical Engineering from Aston University where he was appointed Pro-Chancellor and Chair of Council in 2009. He was appointed a member of the Prime Minister's Council for Science and Technology in June 2011 and has been Chairman of the Engineering and Physical Sciences Research Council since April 2012.

Paul Golby commented:

"I am honoured to have been asked to join Costain as Chairman. It is a great British engineering success story with a strong heritage, outstanding brand and strong market positions. I look forward to playing a part in delivering further success as the Group accelerates its growth agenda."

James Morley, Senior Independent Director, commented:

"On behalf of everyone at Costain, I would like to thank David for the substantial role he has played in guiding the Group on a profitable and successful journey during his seven years as Chairman. We wish him well for the future after he formally steps down in May.

"We are delighted that Paul will be joining Costain. He will bring significant leadership credentials, experience and knowledge to the Board at an exciting time in the Group's development." 

Enquiries:

Costain Group PLC Tel: 01628 842444Tracey Wood, Company Secretary

Catherine Warbrick, Investor Relations Director

Instinctif Partners Tel: 020 7457 2020

Mark Garraway

Helen Tarbet

Notes:

i. As David Allvey will be stepping down from the Board with effect from the close of the Annual General Meeting on 5 May 2016, resolution 5 as set out in the notice of meeting sent to Costain shareholders on 31 March 2016 will not be put to the Annual General Meeting.

ii. No further information is required to be disclosed pursuant to LR 9.6.13R.