Interesting comment from Richard Murphy, the bit I've bolded.
This will not, not course, prevent Tory MPs voting to support him in any vote on a referral to the Standards Committee on Thursday. They will be three line whipped. But there will be many more than Mark Harper MP, who was the only Tory to tell Johnson to go, who will have their doubts about supporting Johnson in that vote. Any in their number who wants to be in a future, non-Johnson, government will have to think very hard about voting to protect a Prime Minister who will seemingly inevitably, and soon, be found guilty of deliberate criminal acts for which on possible excuse can be found. Sunak has already sacrificed his career to support Johnson. How many others will note that, and hold back?
Do you think that voting to support Johnson could affect MP's future careers, (in the slim chance that we get a decent tory party back which looks for ministers who have some actual ability and can satisfy the Ministerial Code)?