British Prime Minister Boris Johnson To Face No-Confidence Vote

The transcript discusses a no confidence vote against UK Prime Minister Boris Johnson, triggered by scandals involving the Conservative Party. The vote, managed by the 1922 Committee, requires a simple majority to decide Johnson's fate. If he survives, he is safe from another vote for a year; if not, a leadership contest will ensue. Historical parallels are drawn with former PM Theresa May. Opposition leader Kier Starmer suggests this could mark the beginning of the end for Johnson, while Johnson's allies argue it could unify the party.

What historical precedent is mentioned regarding former Conservative Prime Ministers and no confidence votes?

What argument are Boris Johnson's allies expected to make to Conservative MPs?