Yeah realised after i posted that sorry knew it was a stupid question. cheers
see Turbojolts thread on Gasless MIGs a couple months ago....
Yes they do in arogshield light, not too sure on what size they're called but they sit about 50cm high, looks to hold 20 litresish, i still wouldn't go BOC, £35 would be lease fee then you'd have rental charges on that.
Getting pub gas is still a cheaper alternative, you can buy an equivalent BOC size Y cylinder for £50ish and down my end it cost £15 per refill. For the differences in weld quality the price doesn't justify.
If I were you buy reasonable gas welder. Do what you need to do then sell it on when your finished.
What are your welding skills like?