MDA acquires Richards Gray in U.K.

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. (TSX: MDA), a provider of essential information solutions, announced today that it has acquired Richards Gray Holdings Ltd. in the U.K. for an initial payment of £10.845 Million and additional contingent payments over three years. The transaction is expected to be slightly accretive in 2008 and more significantly in 2009.

Richards Gray is an established provider of personal searches to both Conveyancing Solicitors and Home Information Pack providers in England and Wales. In addition, the company is also a supplier of Home Information Packs to both Solicitors and Estate Agents.

MDA is seeking clearance from the U.K. Office of Fair Trading for this transaction.

About MDA

MDA provides advanced information solutions that capture and process vast amounts of data, produce essential information, and improve the decision making and operational performance of business and government organizations worldwide.

Focused on markets and customers with strong repeat business potential, MDA delivers a broad spectrum of information solutions, ranging from complex operational systems, to tailored information services, to electronic information products.

MDA employs more than 3,000 people in locations across the United States, the United Kingdom, and Canada. The Company's common shares trade on the Toronto Stock Exchange under the symbol TSX:MDA.

Related Websites:
www.mdacorporation.com
www.richardsgray.co.uk

Forward-Looking Statements

This release contains forward-looking statements and information, which reflect the current view of MacDonald, Dettwiler and Associates Ltd. with respect to future events and financial performance. Any such forward-looking statements are subject to risks and uncertainties and MDA's actual results of operations could differ materially from historical results or current expectations. Additional information on these and other potential factors that could affect MDA's financial results are detailed in documents filed from time to time with the applicable Canadian securities regulatory authorities.

The Toronto Stock Exchange has neither approved nor disapproved the form or content of this release.