One of the advantages of the north/south divide is that the prices up here seem to be well reasonable.

I got a fill yesterday from here http://www.4thelement.co.uk/index.php

I was advised my bottle will require a test in Jan at a cost of £30 - and that they do the testing onsite so no messing about.

The 12L 232 Bar fill cost me £2.50 and that was from empty - I had used the bottom of the fill blasting out a few pc cases of dust prior to rebuilding/fixing some of them.

I do believe (after a search on here), that it doesn't matter so much where you keep them (in terms of temperature exposure i.e. "indoors" or the shed) as there is very little effect on the contents in terms of pressure.

As you say it is important to keep them from falling over or things falling on them esp. in vehicles - though if you are just a sports enthusiast there are no other legal requirements than the bottle be safely restrained in the vehicle

The need for stickers stating compressed gases being carried or the like is for commercial vehicles, though i am not a lawyer and stand to be corrected.

As for kit - There are two differant valves to dive bottles A - Clamp and Din and there are fittings available for both that will allow you to fill a gun, have a look at midland diving - http://www.midlanddiving.com/catalog...3b528b733d7e52 (for the pictures)

There you will also see specific air gun charging kits with a valve and gauge combined.

DON'T buy from there however - the bbs sponsor is cheaper (by lots)!
http://www.jsramsbottom.com/cgi-bin/...PC/PC_fill.HTM

Just a thought - couldn't all the bbs members submit a list of filling places, addresses, rates for fills and tests so we could have all that data collected in one place (possibly a google maps type affair) by a web savvy bbs member, with the top 10 north and south highlighted? (obviously thats proper north, as in north of the Tees).