Auction House, which works with a network of local agents, has a record 846 lots entered into its sales this month.

The boost is largely from buy-to-let landlords selling off their properties.

In its 12-year history, Auction House has not had a month like it.

Founding director Roger Lake said: “Taxation changes are driving many investors to sell off their rental properties.”

He added: “There are still large-scale landlords buying such stock, and plenty of refurbishment specialists who would acquire and carry out improvement programmes.”

Auction House, which holds physical auctions as well as weekly national online sales, has so far sold 2,256 lots this year, up 4.6% on last year.