Balding David Cameron has formed close links with a clinic treating hair loss.

The Trichological Clinic Limited, which operates out of Harrods, gave the Tories £10,000 in the summer.

Proudly bald Labour MP Stephen Pound said: "I'm not sure Cameron is the best advert. The gaps are really starting to appear in his hair.

"Presumably, he will now speak in the Commons with a sign on his head saying 'Sponsored by...'" Two years ago, Mr Cameron changed his hairstyle - to hide his receding hairline.

The Trichological Clinic Limited was founded by hairdresser Philip Kingsley, who said: "Our anxiety about hair is often beyond belief."