I believe they have to apply, or rather register with the authorities if they want to climb, and they have to finish during the day, no overtime camping is allowed.
The snow was kinda crazy, we saw it quite a few times as we had to go over quite a few mountains. Looks like some areas probably have snow all through the year by the looks of it
Yeah, that probably makes sense. It gets pretty chilly when you get up where the air is thin! I don't know what the elevation is like in England but have you noticed a difference with being at such a high altitude?