Labour candidate, Gillian Troughton, a former Corbyn critic, speaks about working with the Labour leader:
Liberal Democrats' candidate, Rebecca Hanson, says the people of Copeland want a candidate who can deal with "rural issues":
UKIP candidate, Fiona Mills, says the nuclear industry and public health services are the major issues in the constituency:
The Conservative MP for Carlisle, John Stevenson, says Corbyn's lack of support for the nuclear industry is a key issue:
The Conservative party and Green Party are yet to announce their candidates for the by-election.