Diplomatic sources told the Daily Mail that the European Commission is resisting setting a date to discuss Sir Keir's ' Brexit reset' because of doubts about whether he will remain in post.
The Ukrainian President joined Sir Keir, Emmanuel Macron and German Chancellor Friedrich Merz for talks on air defence in the face of increasing 'Russian aggression'.
Darren Jones, the Chief Secretary to the Prime Minister, is said to have drawn up a spreadsheet of names of MPs who might support him as Sir Keir's replacement.
The Mail on Sunday can reveal that Sir Keir's allies have drawn up proposals for a six-month handover to would-be successor Mr Burnham - including one final Budget for Chancellor Rachel Reeves .
Jess Phillips, who resigned from Sir Keir's Government this month, said yesterday that 'even if Andy Burnham doesn't win in Makerfield there will be a change of the Prime Minister'.
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.
Jess Phillips, who quit last week backing Wes Streeting for the top job, grudgingly acknowledged Sir Keir's resilience when his 'back is against the wall'.
In his first Commons appearance since quitting the Cabinet Mr Streeting warned of an 'existential threat to the UK' as he set out a thinly-veiled pitch to replace Sir Keir.
The Prime Minister's former chief of staff is understood to be once again offering advice to Sir Keir, despite exiting Downing Street in February over his role in appointing Peter Mandelson as US amb…