Hi there, as JackEb said I'm from the UK too. The eclipse is an awesome choice and great for auto work I use one for bikes and it is ideal. My preference is for the HP-CS and I think pretty much the best price you'll get one for is here :-
https://www.spraygunsdirect.co.uk/i...-japanese-precision.html#sthash.LGgLcqyR.dpbs
I've used that company before and had good service (not to buy an airbrush I must say though) The airbrush only sites seem to be anywhere from £15 to £40 more.
As for a compressor what do you need. If noise is not an issue then any regular compressor (as long as it has a tank) will work fine. Just get a water trap and you're good to go. It's the cheapest option, and if you already have a compressor like that, you just need to get some adapters to size down to a compressor hose.
If noise is an issue, then its pretty expensive. Though you can sometimes pick them up second hand. People who are a bit handy swap noisy motors from regular compressors with fridge motors. Let us know which way you want to go and we can point you the right way.