Quote Originally Posted by grain_r View Post

I brought a rent free bottle from Barnett welding supplies a small family run business and you pay for the bottle for the first time but then it is the Delivery and the cost of the gas.

http://barnet-welding.co.uk/
I did similar, but used Hobbyweld as they have a supplier very near to me. My last bottle of argon mix lasted over 3 years, which is better than the disposables (£ for £) which can also empty themselves spontaneously.