People moan about MP’s being lobby fodder so what’s going to happen if they face by elections if they’ lose the whip. That’s one way to get MP’s to vote on party lines & stop independent thinking.
If MP’s want to stand in a by elections as Carswell & Reckless did, that’s great. If they don’t, like Soubry & Gove didn’t, that’s up to them, they’ll face the electorate eventually. I don’t recall Soggy calling for Corbyn to face a by election…