Grandad
It is not for me to produce facts as I have not repeatedly made the statement and I point out if you had not raised this point again so recently I would have dropped asking.
In your link the only named MP's are Neil Coyle, and Wes Streeting who I accept are not on the Corbynista faction of the Party.
When asked to presumably comment on the rumour by Huff Post, who did not provide facts, how the question was formatted to could lead to various answers.
MP Wes Streeting said ' he was sceptical any breakaway would materialise given the failure of the Independent Group, and that MPs saw shadow Brexit secretary Keir Starmer as the most likely winner not Long-Bailey.
MP Neil Coyle, who put the number “closer to a dozen”, told HuffPost UK: “Continuity Corbyn is a death knell for Labour' . told HuffPost “Division, factionalism and introspection will continue. Favouritism and bullying will continue. Anti-Semitism will continue. Failure in elections will continue.'
Coyle is probably correct.
The death knell is too strong a term as Labour will always be a Political Party unless a ' split ' does evolve, such as one you have described the Unions withdrawing funding for the Parliamentary Labour Party, giving rise to neither the PLP or Unions can lay claim to owning the Labour Party name as their sole domain.
' IF ' and again I repeat' IF ' that scenario occurs then it will be because Rebecca Long Bailey becomes Leader and does follow in Corbyns footsteps but that only time will tell. That revolves around who she as Labour Leader chooses to surround her. If the status quo remains e. g Seamus Milne, Walker, Momentum then that will be the time probably to know who, what, when, where the Labour Party moves forward to any kind of a ' split
On a personal note it must be a troubling time and I do appreciate you are busy, it must be hard going'.