PresidentHump I'd guessed that Hugh Dennis might be back because I rewatched episode 1 and he's in the flashbacks, which usually means there's some relevance to the upcoming story.
I don't think it tells us anything about the storyline though!
There's going to be a wedding, so that's an opportunity to get loads of characters old and new on screen, for PWB to write surprising / disastrous / farcical / redeeming interactions between them.
Hugh Dennis and the Priest on screen together could make for some great TV, for example. Doesn't mean Fleabag and him get together.
And anyway, surely the Hugh Dennis character won't come in as a white knight to "rescue" Fleabag - it's not that kind of story!
I think I might have worked out what the Priest's past is about btw, from rewatching and seeing possible hints - but I'm not saying as I don't want to spoil it! And if I am right, I don't want anyone to conform or solidify it as I want to enjoy the element of surprise!
Hurry up Monday!