10. Telent Technology Services

Revenue: £466.8m (-3.5%)

Employees: 2,500+

Talent once again made the cut this year despite tough year for the Warwickshire-based group, as it delivered a 3.5 per cent drop in gross revenue.

The outfit continues to focus on its network services business in strategic core market areas including emergency services, telecom service providers and government. It sees these areas as "major growth opportunities".

Last year, majority of the group's revenues come from public sector contracts, including extensions of Merseyside Fire and Rescue in East Sussex and Fire IT resource its main Firelink contract, as well as new wins, including a ~major network transformation project" for the University of Bristol, a network build with Cisco for the Greater Manchester Combined Authority, an IT services outsource for the MCA and a number of private mobile network builds, according to its filings.