[Margaret Pilkington]

That maybe the case Cashy, but it may be that Boris could not stand to be labelled a hypocrite....because he would most certainly be called that.
Although, he was not in public office when he had his dalliances...nor was he contravening rules that he had put into place.
If Boris had made it clear that the sacking was because of the contravention of the rules rather than the illicit affair, then maybe he would have gained some respect.
As it is, this dalliance has brought Matt Hancock down(no bad thing) and has damaged the shaky integrity of the PM.