One square foot in Mayfair will cost you £150.70, leading the world in office space ahead of Tokyo, Moscow and New York, showing that the economic slow down has as yet not affected London's business districts like the West End and the City.

CB Richard Ellis the global property agent in its report said that City of London in comparison to the West End was relatively cheap with rentals at £82.60 per square foot.  However Midtown Manhatten is the most expensive market in north America at £52 per sq ft was ranked at 13 worldwide.