I'm going up by train as well but will ask around see if any friends have one. I doubt it unfortunately as MTBs are still way more popular than road bikes up there.
I've got a basic Tacx/ skewer/ riser you're more than welcome to borrow if you need a lighter trainer - can leave down at Hex for you to pick up at leisure.
Actually, either of you two got a turbo I could warm up on? I'm not going to be lugging 25kg of Wahoo Kickr up on the train...