It was the same situation with Frank Field and John Woodcock. If you leave the party whose ticket you were elected upon, you should resign and be prepared to contest another vote. The vast majority of people vote accrding to the policies of a particular political party and who is the leader of that party. If these MPs campaigned wearing red rosettes with Jermey Corbyn as their leader, less than two years ago, then they cannot remain as MPs. Coming at what is a difficult time,this is obviously going to be damaging for the Party. And what is happening about Fiona Onasanya!? She isn't even sitting in parliament anymore.
In other news today a headline which will no doubt be used to blame on Brexit and influence Parliament's actions next week (its intention) Honda have announced the closure of their car plant at Swindon.
However, this decision was influenced directly by the new trade deal that the EU signed up with Japan, which means cars can be shipped directly into Europe without tarrifs.Honda set to close Swindon car plant
https://www.bbc.co.uk/news/business-47282603
Now if we had some leadership in the Country (which we don't) Honda should be told in no uncertain terms, that as this trade deal will not apply to the UK after Brexit. If they want to continue selling many millions of shinny new cars in the Country without hefty tarrifs, they will need to keep at least some of this plant open.