Sue Gray, ousted from No 10 in the early months of Sir Keir's premiership, is understood to be helping the Manchester Mayor to sketch out the 'configuration' of a Burnham Downing Street.

The mayor of Greater Manchester is bidding to replace Keir Starmer in 10 Downing Street. What he does next is still being worked out.

The Prime Minister said he wanted the ‘whole Labour movement’ to be involved in the vital by-election