To ask the Secretary of State for the Environment what services are provided on behalf of the Government by local authorities at Heathrow airport.

[pursuant to his reply, 13 July 1990, c. 350]: No local authority acts as agent for the Government in providing services at Heathrow airport: such functions as they discharge there are their own responsibility.I understand, however, that staff of the London borough of Hillingdon are employed in support of medical inspectors of immigrants at Heathrow airport. The council also negotiates the rental of the health control unit premises at the airport.