i think you can now buy dual band, that covers UK and EU frequencies. I dont know for sure though.
I use a CB when green laning in the landrover in a convoy, with a small springer i get about 1-2miles range, with a large springer about 3-4 and with a large firestick i get about 6+miles.
The firestick is good for convoying on roads etc, but as its rigid fibreglass it doesnt bend so is useless on 'off road' type adventures where undergrowth will break it.
Its a handy thing to have, one of the guys has a handheld one that plugs onto a 12v cigarette socket and an external area so can be used as a fixed device, but also taken out the vehicle for one foot