The Tories would have been buried if he had become leader again and was subsequently found to have misled Parliament, for which there seems to be plenty of evidence.
And they won’t investigate because the incident 7 whole days ago was under a different administration. It’s a shocking and has the potential to bring the whole house of cards down again.
If Johnson can show, with evidence, when he did a last proper day's work as an MP then he should be allowed to run. He's basically been on holiday since he resigned.
He hasn't got any votes recorded since July.