So having watched some of it (and seen most of it) I can say its clear they are not engineers, nor welders or even metal workers but artists who use metal. Its intersting to watch but to be honest it was more back ground noise than anything (and the presenter was annoying, it felt like a panto with him trying to be funny and it not being) 3/10.... would not advise!
I've just seen the trailer but I reconed Tom Patsis being on the show and he's quite an artist and race car welder tooNot seen it but not surprised by the descriptions above. To be fair, welders aren't artists (usually) and artists aren't welders.
Their H&S and welding is appalling