Landlords in London are leaving the market “in droves”, ARLA has said.

The trade body said that in December, its lettings branch members reported an average of six landlords selling up and quitting the market.

The number compared to a national average of four, and was double the number of landlords selling up in the north-east, midlands, east of England and south-west.

In each of those regions, agents reported three landlords selling up.

ARLA Propertymark chief executive David Cox said: “Over the last few years, landlords across the country have been pushed out of the market by increasing costs and legislation, and new investors have been deterred from entering.

“The issue has particularly intensified in the capital, which may be the result of landlords starting to receive their first tax bill incorporating the increase in taxes from the mortgage interest relief changes which came into force last tax year.

“If this trend continues, coupled with the Mayor of London, Sadiq Khan’s recent pledge to introduce rent controls, it will only serve to make the situation worse for London’s renters as more landlords are forced to sell up.

“As the supply of rental accommodation falls further, tenants will face more competition for properties, which will push up rents on good-quality, well-managed properties, and leave the vulnerable and low-income people which rent controls are designed to help, in the hands of rogue and criminal operators.”

A total of 364 ARLA agents were questioned last month, of whom 60 are in London.