Christian Wakefield:
The Labour Party are welcome to him. His departure seems to have somewhat stifled Conservative action about Boris.

To quote the Manchester Evening News

In September 2020, he presented and backed the Recall of MPs (Change of Party Affiliation) Bill - which was sponsored by Conservative MP Anthony Mangnall.
The bill would enable constituents to recall their MP and call a by-election if they 'voluntarily change their political party affiliation'.

Young Labour said in a Tweet: "The Labour Party must uphold Bury South members’ right to choose their own Labour candidate and constituents should be able to reassess their MP."