“I repeat my deep apology for mistakes that may’ve been made on my watch”, answers Boris Johnson.
Let’s analyse this from Johnson on Sky News:
“mistakes”. The evidence is strong that the participants and probably Johnson himself broke the law. These are not “mistakes” but criminal acts.
“may’ve been made”. This use of the conditional “may” goes contrary to all the evidence that the events did happen. There is no “may” about it.
“on my watch”. This is an attempt to distance Johnson from what happened. Yes he acknowledges that something may have happened when he was in charge. But the evidence is that he was actualg a participant. That it took place in his home/office and he was there and an active player.