Clause 4, the Blair version, was and is still in place. Corbyn was a rebel against his own party constitution. Bizarre stuff. He lost two elections, albeit with one surprisingly good performance, coupled with one total destruction, he was clearly never a credible leader with the electorate and certainly had the majority of his own MPs against him - they won’t make the mistake of nominating someone of his ilk ‘for balance’ again. Not really important any more, Labour is definitely New Labour again.
I brought up Corbyn as a an example of what's possible and a suggestion as to why Socialists within Labour might stick with the party under Starmer.
A Socialist government is only possible via a New Labour one.