Doodledog: the Committee can recommend a period of suspension from Parliament. If that suspension is for more than 10 days (as would now seem likely in Johnson’s case) and the Commons vote in favour, it triggers a recall petition. If this is signed by enough constituents, there is a by-election. No prisons, no exile, not even a free trip to Rwanda.
Johnson’s nonsense about being forced out by a few people is therefore risible; the bar for getting rid of an MP is very high, and involves 3 democratic processes: the Privileges Committee, the Commons, and the electorate.