Through the keyhole!

Take a peek behind the electric gates of Britain's swankiest mega-homes...

- HANNAH DAVIES, NATASHA HOLT

Fancy becoming the new lord or lady of a multimillion-pound 19th-century manor house in Norfolk, or living in a penthouse in London's Knightsbridge? Both are available to buy for anyone with deep pockets in the first of the new series of C4's Britain's Most Expensive Houses. And at £80 million, the Knightsbridge apartment, just minutes from Harrods, is currently the