British house prices have fallen sharply this month, the fastest rate for 12 years. However that has not deterred Britain's most expensive house from being put on the market with a record price tag of £90million! Wow that's expensive! The six storey house is situated in picturesque Belgrave Square and boasts 12 bedrooms, basement swimming pool and garaging for four cars! The house is currently being refurbished and is set to enter the marketplace in the New Year. Offers invited!