Oops sorry - went off too soon!
Soneone said they'd feel let down by Charles if he allowed H back, and daft as it sounds, this is how I'd feel too.
My late Dh was a staunch republican for most of his adult life. Then it came to a point where he had to work on a project in which Charles was heavily involved. After their first meeting, he begrudgingly admitted to having liked him but felt maybe that was because Charles had been on a charm offensive.
As the weeks went on, he admitted to liking him more. And then to respecting him and his opinion. And finally, to looking forward to their meetings.
I would sort of somehow, stupidly, feel that I would be letting dh down, if Charles did accept H and M back into the fold, and I was ok with it! That probably only makes sense in my own head though!