I think building regulations give minimum and maximum heights for items which need touching and items which need to be viewed, seem to remember this varies depending on if domestic or not, and the building inspector can allow different heights if good reason, one consideration is some one standing can bend down, some one in a wheel chair can't jump up.
But there are times when you don't want all to reach, so switches are some times put at ceiling height out of the way of children.
It seems an off mix with a lit mirror, towel rail, and washing machine. If room classed as a bathroom, then even more rules, but there are official guides to building regulations depending where you live, I think Monmouth is Wales, so a bathroom would be a special location, so I would run it past the building inspector.
I do often get the impression that wheelchair users end up getting preferential treatment over people with other kinds of problem/disability because their disability is so visible and their advocacy groups so strong. There are lots of people who can walk but find bending down very difficult.