Conservative Party chairman Oliver Dowden has resigned after two humiliating by-election defeats.
In a letter to Prime Minister Boris Johnson the Tory MP said "someone must take responsibility" for the losses in Tiverton and Honiton to the Lib Dems and Wakefield to Labour.
The contests, triggered by the resignation of disgraced Tories, offered voters the chance to give their verdict on the PM just weeks after 41 per cent of his own MPs cast their ballots against him.
