Honest answer … it’s a driving challenge with a bit of hiking in between. It’s really not difficult in any way and i think there are better challenges out there.
I did it with a bunch of mates completely unprepared when we were quite young. It was in the middle of a Met Office severe weather warning (in Sept/Oct time), none of us had the right knowledge, experience or equipment, we didn’t know what we were doing and were lucky to get away with it. Properly stupid, idiot 19 year old boy stuff that could have ended up a lot worse!!! Gale force gusts of winds nearly ripped a friend of mine of Scaffell in the middle of the night with next to zero visibility due to fog. It was like an episode of 999! Idiots!!
All of the routes are pretty much well worn paths, so easy to navigate etc. You’d fly up and down the tracks mate, without any great difficulty. It’s made a lot easier if you have a DES so you can kip between the mountains. Most people go Ben Nevis, Scaffell, Snowdon.
Sorry to be a bit down on the whole thing. I just, personally, think it’s one of those things that sounds a lot cooler than it is.