Yep, in Glen Matlocks book (he of The Sex Pistols) he says that everywhere else in the world musicians are treated fairly, even royally, whereas in GB once you’ve finished playing it’s “you’re in the way of the disco, can you eff off now”.
Some UK promoters really get it, but they’re few & far in my experience, whereas play in Europe and you’re treated very well indeed, to the point of contacting you before the gigs to establish if any band members are veggie/vegan/have any food allergies. In some places in the UK you won’t even get a bottle of water to go on stage with.