So, we've had the police investigation, the biggest outcome of which is that the Met are, at best!, shockingly inept. We've now had the Sue Gray report. We've also had photographs appear in the media.
There cannot be any serious doubt that there were plenty of parties in Downing Street, nor can Boris credibly claim either that all the rules were followed nor that he believed they were followed. His statement to the Commons is, therefore, a clear-cut case of him knowingly misleading parliament.
He must go.
More importantly, if he does not go willingly, and if the Tory MPs behind him close ranks to keep him in office, that is the death of decency in public life in the country. It is the death of any notion that there are checks and balances on the government. It is the death of the UK as a democracy - we become an elected dictatorship.
He absolutely, and without question, has to go.