I went to B&Q today and bought a garden tap kit. The concept is really simple they give you a self-tapping tap which you screw into your cold water mains, attach a length of felixible pipe to that, drill a 16mm hole in the wall, push the pipe through and attach your fixing plate and tap to the length of pipe.
However I powdered out of the operation and went for a run instead. I don't like the idea of a self tapping valve, it just seems wrong, how can the seal be as good as a normal connection. The beauty is you don't have to turn the water off, nor hack away at your pipes. When we fitted our new sink recently I got the plumber to fit a couple of isolating valves, I have decided to attempt the tap install within the bounaries of this isolating valve, so if it messes up I can cut the water off.