Firebobby,
Thanks for the PM and offer of help.
In the meantime I have taken some bits off of the welder and in particular the torch. I was hoping that I could get the tip out of the torch (see A in image below), but it was stuck solid, and as warned snapped off. I was also hoping I could replace the gas line, and wire liner (see B & C in image below) but I can't work out how to remove the little brass connectors that appear to be pressed in, or where to buy replacements.
Any advice appreciated. I have seen that you can buy the bent bit on the torches quite easly online. Cant see the little brass connectors though.
Please ignore D & E in the image.
Regards
Alan