The streets are located in three select enclaves in the capital, with the most expensive being Courtenay Avenue in Highgate (N6) – where the average property costs £6.8 million pounds.

Five other streets in the same area were also included in the top twenty most expensive streets, making it one of the most desirable places to live in the capital.

Ingram Avenue – which forms part of a cluster of streets between Hampstead and Highgate golf courses - ranks number 11, with an average property price of £5.16 million. Winnington Road comes in 17th place, with an average price-tag of £4.73 million.

Unsurprisingly The Royal Borough of Kensington and Chelsea boasts the second most exclusive collection of streets – stretching between the King's Road to the north and Fulham Road to the south.

The second most expensive street in London, Chelsea Square (average house price £6.44 million) is located in the area, along with the third, Manresa Road (£6.19 million), sixth, Carlyle Square (£5.58 million) and eighth, The Vale (£5.44 million) most costly residencies.

The third most expensive group of streets is also located in Kensington and Chelsea, but is situated south of Hyde Park on the west of Gloucester Road and Palace Gate, between Kensington High Street and Gloucester Road tube stations.

"It is fascinating to see how the rankings of Britain's most desirable places to live form such clear and distinct clusters," commented Zipporah Morrison Baker, of Mouseprice.net.