I live in the uk, I've a couple of welders a mig and a mma, both had bs4343 connectors (the round blue ones found in industrial applications).
Being totally irresponsible and farmer like both sets have a standard 13a plug on.
Theres been occaisions where the plugtop has welded itself into the socket or an extension has been a little too warm.
You can fit a standard uk mains plug, but please only use a 13a fuse designed for it, you'll get around 100amps or so weld current before the fuse goes