I'd definitely go for the CP1. I regularly use mine to shoot at 20 yards on PL12 targets, and it puts up a decent performance at that range. Mine's a .22. One 12g bulb is good for 40 shots, and that will keep them all in the 8 ring for me (If I was a better shot, that could be a 9 ring group). Many more than 40 though and it starts to drop out of the black.
The grip shape though, is awful. I modified mine so that it could be held by a human.
https://www.flickr.com/photos/147194...posted-public/
The South of England has 2 good things, the M1 and the A1. Both will take you to Yorkshire.