BOARD AND GOVERNANCE

John Rennocks ^1,2,3 - Non-Executive Chairman

Joined the Board in July 2002 and appointed Chairman in January 2004. John is a Chartered Accountant with over 40 years of experience in commerce and industry, including nearly 20 years as the Finance Director of FTSE 100 companies. He has been a non-Executive Director of many companies in the past 17 years, including as Chairman of six other public or private companies across several industrial or support service sectors. John is currently Chairman of Intelligent Energy PLC and the Senior Independent Director of Inmarsat PLC and Babcock International Group PLC.

Bruce Thompson - Chief Executive Officer

Joined the Board in 1994 as a Group Director and appointed Chief Executive Officer in 1996. Bruce started his career in the automotive industry, first as a design engineer and then in product marketing. He then spent three years in international marketing with a construction materials company, developing new markets in Europe, the Middle East and North Africa. Prior to joining Diploma, he was a Director with Arthur D Little Inc., the technology and management consulting firm, initially in the UK and then as Director of the firm's Technology Management Practice based in Cambridge, Massachusetts.

Nigel Lingwood - Group Finance Director and Company Secretary

Joined the Company in June 2001 and appointed Group Finance Director in July 2001. Prior to joining the Company, Nigel was the Group Financial Controller at Unigate PLC where he gained experience of working in a large multi-national environment and on a number of large corporate transactions. Nigel qualified as a Chartered Accountant with Price Waterhouse London.

John Matthews^1,2,3 - Non-Executive Director

Joined the Board in 2003. John is a Chartered Accountant and a former Managing Director and Head of Corporate Finance at County NatWest. Subsequent to this he was Deputy Chairman and Deputy Chief Executive at Beazer plc, an international civil engineering, construction, house building and aggregates group. He has also been Chairman of Crest Nicholson plc and Regus plc and a non-Executive Director of a number of listed and private companies. John is currently a member of the Board of SDL plc and Aurelian Oil & Gas plc and a member of the Advisory Board of Alexander Proudfoot.

Ian Grice^1,2,3 - Non-Executive Director

Joined the Board in January 2007. A chartered engineer with over 35 years experience in the Support Services and Construction sectors, in the UK and International markets. Ian held senior roles in several industrial groups before joining the board of Alfred McAlpine plc in 1995 where he was Chief Executive Officer from 2003 to 2008. Ian is currently a member of the Supervisory Board of Arcadis NV, and a non-Executive Director of three private companies.

Iain Henderson - Chief Operating Officer

Joined the Board as a Director in 1998 and appointed Chief Operating Officer in 2005. Iain qualified as a chartered management accountant and began his career in the food industry, progressing to be an operations general manager with H J Heinz. Since 1988, Iain has specialised in the acquisition and development of small to medium sized enterprises ("SME") within group structures. This was firstly within the privately owned Bricom MBO, where he ran ANC Holdings and from 1994 in a public company environment as a Director of Glenchewton plc and then Diploma PLC.