Autotrader is owned by Apax, the private equity firm run by Tory donor Adrian Beecroft, who has donated £593,000 to the Tories.

The company has donated £32,000 to the party, and Director Mark Samworth has donated £585,000 to the Tories since 2010.

Donated £827,562 to the Tory party between 2011 and December last year.

Gave a £25,000 donation in the run up to the 2010 election