In 2016 the cost of a house in London per habitable room - i.e. excluding bathrooms, conservatories, kitchens and utility rooms - was £132,926.

This is more than the average cost of an entire property in the North East of England, worth £128,000 in July 2016, according to the ONS's house price index.

London is even more of an outlier when property size is factored in

London's house prices have been galloping ahead of the rest of the country over the past decade and the disparity is even more pronounced when looking a the price of properties relative to their size.

The price per room of properties in London has increased by 99 per cent over the past 12 years, more than double the national average rate of 46 per cent.

The average house in London sold for an average of 2.1 times the England and Wales average of £237,720 in the ONS's latest house price index.