I forgot about Philip Hayton leaving because of Kate Silverton. I don't think he was really suited to that style of presenting where you have to interact with your co-presenter. He was a straight news reader and I'm surprised he lasted so long considering they shamefully axed Moira Stuart. I miss her - she has such a dirty laugh.
EDIT: I've just found this https://tvforum.uk/thenewsroom/philip-hayton-quits-17836/
Yes, it's interesting that the majority of the 'old school' fixed bulletin style presenters seemed to struggle with the who 24 hour, breaking news get up. I guess though that's fair enough, it's a fairly big jump to make and a whole change in style.
Of course, plenty have gone on to make the transition successfully but, I agree, Moira would be marvellous on the News Channel these days. Shove over Victoria, let's have Moira Live!