Get an FAC and then buy one of THESE I had one of the originals but the stock leaked and eventually cracked badly. The new ones from Henry have addressed all the old problems and it is now a very compact and usable rifle.
You will sometimes see a very good take down called a Colchester Gamekeeper being offered for sale. Be careful as there were only 3 complete rifles ever made. The rest were cobbled together from spares. I was told about this by the man who designed and built it. He now works for Mallard Barns and is developing a new range of PCPs for £200 raedy to go