UK’s most expensive flats all in London (Image credit-iStock)

The country’s most expensive one-bedroom flats are all for sale in the capital, reveals new research.

HouseSimple concluded the UK’s most costly apartment has a price tag of almost £5 million - making it 22 times the average price of a UK property.

There is a total of 585 one-bedroom flats for sale in London valued in excess of £1 million, with the smallest measuring just 416 square feet.

Examining the Zoopla property listings, 27 per cent of these £1 million plus flats are located in the borough of Lambeth, with 23 per cent in the City of Westminster, and 22 per cent in the Kensington and Chelsea.

It was also discovered there are four studio flats on offer in the city with an asking price of more than £1 million.

Sam Mitchell, chief executive officer of HouseSimple, explained: “Though prices in London have stalled for the time being, and foreign buyers are more cautious about investing here, the average price of property in the capital still means it’s one of the most expensive cities in the world to buy.

“These one bed flats sourced in our research aren’t ever going to be on the radar of the typical first-time buyer. They are more likely to be purchased by wealthy business travellers commuting to the capital,” he added.