Is it unreasonable to book an accessible room?

[Cupsofdecafftea]

I have to go to London for a work trip - I don’t want to go but it’s unavoidable. I am VERY frightened of flying and have not flown in decades. I therefore am looking at getting the train. The best option to get me there in time is the sleeper train but unfortunately all the ‘cabins’ are booked except for the ‘accessible’ rooms, which are clearly designed for people with disabilities in mind. I would not fall into that definition. The train website does not state that you have to have a disability to book these spaces but clearly they state they are designed for people with disabilities. Would I be a terrible person if I booked one?

Ring the train company and ask?
If the trip is very soon, the train company would probably rather have an able-bodied passenger than none. Maybe they have some protocol that makes them available to anyone after a certain point. Or maybe they have no restriction on who uses them, just hoping people will observe the labels if there is still a choice.

I'd do this. I am disabled and would need one, but if you're travelling soon, and they're not booked, it's fine to ask.