I'm not originally from the UK, and haven't been in this situation before, and of course, DH has no idea, so I thought I'd ask here.
On Saturday night, my family are invited to the engagement party for the son of couple who are friends but not close friends. The young groom-to-be also happens to be a sports coach for my dc once a week and is at college doing a sports and recreation qualification and he's really lovely. He and his bride-to-be still both live with their parents. The party is going to be at a social club and I think there will be a cash bar but they will provide some food.
So, I'm wondering what the gift-giving etiquette for this sort of thing is. Is a bottle of wine good or should it be some other sort of present? Thanks - I really appreciate any guidance.