London's most expensive postcode, where homes cost more than £4 million

Surprise, surprise. The top 10 most expensive postcodes in England and Wales are all in London, analysis of Land Registry data has revealed.The breakdown, conducted by prime property broker Jeffries James, shows that nine of these London postcodes are concentrated within three boroughs: Westminster, Kensington and Chelsea and the City of London.W1 postcodes, which cover Mayfair, Fitzrovia, Soho and Marylebone, make up three of the country’s top 10 priciest postcodes.The exception is EN5, the 10th most expensive place to buy a property in England and Wales. Hertsmere, covering parts of Barnet and Enfield, is on the northern border of London.