if its a bolt in cage you dont need certs off the welder, just make sure the cage has decent plates to the floor and the welds are good for your own safety. i just bought a car with a badly welded in cage and no plates. will be doing a bit of cutting and welding at the weekend.
Its a bolt in jobbie alright, good welds on the plates.
Was well fitted only for the fact that the cage itself has no door bars. So is it ok to pick up some 44mm bar and get a welder to put them in? Or does the steel have to meet the same standards as the cage itself?