Tim Dwelly left the Labour party two weeks after being re-elected as head of the group in Cornwall Council

Labour’s leader in Cornwall was threatened with “bloodletting” and bullied into silence by hard-left supporters of Jeremy Corbyn days before he was forced to resign last week, it can be revealed.

Tim Dwelly left the party on Thursday just two weeks after being re-elected as head of the Labour group in Cornwall Council, saying left-wing activists “actively attacking me” had made his position untenable.

Months of abuse against Dwelly is being seen as part of a wider plot by Momentum activists to seize control of Labour in the south west peninsula.

Their effort has been dubbed “Haringey 2.0”, a reference to the north London council where the group has tried to seize control.

The Sunday Times has now obtained a letter sent to Dwelly hours