as far as i know it's not that easy any more. bottles are registered to account holders and with insurance companies who check on locations of the bottles, could be different with private account holders though?
will check for you next week, have got to set an account up with someone for some argoshield and argon.
what size bottle do you need? there are a couple of people doing them on fleabay, think the nearest is wrexham if you wanted to save courier costs.