Pre-close Trading Update

Pre-Close Trading Update

16 December 2010

Ahead of meetings with analysts prior to its financial year end on 31 December
2010, Serco Group plc (Serco) reconfirms the guidance given in its Interim
Management Statement on 15 November. We remain on track to deliver our
financial guidance for 2010, which is for continued strong organic revenue
growth and further progress towards our 2012 margin guidance.

Our confidence is underpinned by the strong global demand for the efficient
delivery of essential services which drives significant opportunities for Serco
in both existing and new markets, and by our operational and financial
performance during the year to date.

Serco will release its 2010 full year results on 2 March 2011.

For further information please contact Serco:

Dominic Cheetham, Director of Corporate Communications [phone]

Jill Sherratt, Interim Head of Investor Relations [phone]

Marcus De Ville, Head of Media Relations [phone]

Financial Guidance

Our projections are that, by the end of 2012, our revenue will increase to
approximately £5bn and our Adjusted operating profit margin to approximately
6.3%, excluding material acquisitions, disposals and currency effects, based on
2008 exchange rates.

In 2010, we expect continued strong organic growth and further progress towards
our 2012 margin guidance.

About Serco

Serco is a FTSE 100 international service company, which combines commercial
know-how with a deep public service ethos.

Around the world, we improve essential services by managing people, processes,
technology and assets more effectively. We advise policy makers, design
innovative solutions, integrate systems and - most of all - deliver to the
public.

Serco supports governments, agencies and companies who seek a trusted partner
with a solid track record of providing assured service excellence. Our people
offer operational, management and consulting expertise in the aviation, BPO,
defence, education, environmental services, facilities management, health, home
affairs, information and communications technology, knowledge services, local
government, science and nuclear, transport, welfare to work and the commercial
sectors.

More information can be found at www.serco.com