As one who was sat on a lonely moorland road with a relay providing a communications link for "large sporting event" recently, where even Mountain Rescue were using a sat phone data uplink, I can say that coverage in the Dales is somewhat "undewearish".
Do you know how much those sat phones cost to actually use? When you've a sudden inrush of spectators then the cells quickly fall over anyway, they're not able to cope. Oh well, but even if every village has full coverage there will still be blank spots in valleys, round the back of hills etc. VHF radio in your National Park vehicle works a lot better than the phone.
I doubt however if the backhaul could cope. A well know national communication company's recent "upgrades" spectactularly underperformed, and the all singing all dancing radio system hired in didn't talk between centres, so the backup deployed was ticking over all day.
Nuff said, I'm off, and that is a VHF handheld radio in the pocket.