Yeah, between my family we will probably vote for at least 5 different UK parties. We have even had conversations about politics briefly, but nothing that upsets anyone. Even accusations of all the children/grand children being communists are something to laugh about.

My partners family is more mixed. Certainly a few who could get very angry about it. But still no one under 40 would be angry if I said I was going to vote green, reform or even restore. Though they might take the piss out of you if you intended to vote restore.