Capt David - if you get as far west as the Welsh border and the Marches, you'd be welcome to come and shoot rabbits and hares here as much as you like for free. I shoot hundreds of rabbits - two thousand the year before last - with a .22LR, mostly at night, from a 4x4, using a red filtered lamp.
We could also introduce you to the very entertaining pastime of shooting bolting rabbits with a shotgun - done during the day, using a ferret (a small, bad tempered and smelly Mustelid) to get the rabbits to bolt from their burrows. The brown hare population is pretty healthy around here at the moment, so I cull a few each year for my own consumption - roast saddle of hare and jugged hare is the food of Kings. The .17HMR is my calibre of choice for hares and watching my Vizsla bitch trying to retrieve a hare almost as big as her is brilliant.
Adam.