He has become the first MP to be given the Investors In People accreditation.

The scheme is run on an area-wide basis, and Mr Brake received his award from South London TEC & Business Link.

He said: "Some MPs are very casual with the people they employ, and don't bother to provide contracts, set objectives or even carry out reviews and assessments.

"Staff do not feel valued or motivated, and therefore do not provide the kind of service the public expects."

Area assessor Dr Clifford Sparrowhawk said: "We are very pleased that Tom Brake has become the first MP in the country to receive the accreditation and hope it will encourage others.

"Tom's office offered many examples of best practice including great teamwork."

For more information on the scheme call South London TEC and Business Link on 020 8315 6666.