https://www.mirror.co.uk/news/weird-news/mum-slams-utterly-ridiculous-school-30403085.amp
I am in two minds about this. While I think a lot of people are struggling with the increase in bills. ( me included) to complain over something that is a choice and not comparing like with like is silly.
In 2018 a school trip to Barcelona cost £600 for my daughter with all food including and entertainment even a theme park.
While £800 is a lot for one person it would be a different experience to a week in a caravan as the woman describes. She maybe pushing it for a weekend in centre parks. 
It is her choice what she does with any spare money. She didn't have to send her son on the trip and I would probably make the same choice but realise it's cheaper for a reason. However not complaining to the school that's bizarre.
However it also highlights another cost of living division and everything costing more and more.
I am in two minds.