Jeremy Corbyn's core campaign team of dedicated activists, Momentum, has been diverting campaigners away from the marginal seats of some of his most vocal critics, including Wes Streeting and Neil Coyle.

The hard-left group created a marginal map, launched last Thursday, in which voters type in their postcodes and are directed to their 'nearest marginal'.

The Telegraph checked postcodes in the marginal seats to see whether they were included on the map.

However, voters in the seats of 36 out of the 50 former Labour MPs with the lowest majorities, when the Telegraph checked, were directed to other constituencies.