To answer the question the (MIA) OP actually asked, it’s irrelevant where the trip is to. The question was ‘Should a school, in a very deprived area, be offering any trip that costs £900’.
I’ve read all of the posts and I’ve thought about it a lot and decided that I think it’s, on balance, good to offer them.
These trips almost always have limited spaces available anyway, they’re not designed to take an entire year group, so no one will be ‘left behind’.
Obviously it’s disappointing for kids who would like to go but their family can’t afford it.
However, it’s a great opportunity for those who can go. They might be from families that are only slightly better off and only just manage to get the money together. That opportunity might be the thing that really motivates them to work hard, study and do their very best. Whether that’s because they were motivated by something specific about that trip or simply just because they got to see the opportunities that being more financially comfortable offers you. (Sorry if that sounds ‘off’ but I can’t think of a better way to describe it.).
I do also think there’s potential ‘rub off’ for the children who didn’t go. Hearing the others talk about it, they might be more motivated to do well, if they’re excited to go and see more of the world.
I think people saying trips that are ‘just holidays’ shouldn’t be facilitated by the school are incredibly short sighted. One of my god daughters went on an optional school trip, purely holiday, she saved all her Birthday/Christmas money & chose to ‘go without’ other things to enable her parents to pay for it (it was much more expensive than £900). It has shaped her life enormously. She’s a marine biologist now which isn’t something that would have been on her radar if she hadn’t gone on that ‘holiday’ and she has a very good set of friends that are from that class (she lives overseas where you don’t stay with the same kids every year). They were 13 when they went and I think it really helped them to cement friendships for life.
Value for money is an entirely different matter. DC13 went on a ski trip in Dec. It was more expensive than that, but it was reasonable value for money all considered. If I had taken her it would have more than her place on the trip, but less than 2 places on the trip. We’d have skied more (quite a lot more!) but she wouldn’t have had the experience she had of going with 45 girls, making new friends (mixed year groups) and all the fun that comes with going with a group of mates. It’s a totally different thing.