The fact that he was asking others if they were electricians and showing other people waiting, a picture on his phone, asking what was missing, that he needed, to get his power back on as the electric board had come round and cut him off for some reason,How did you know he was a diyer
Well to me anyway I would have thought messing with the service head is a bit more serious than buying a bit of cable to wire a garage without notifying.
Butting in and saying so would likely be greeted with F*** off and mind your own business
Obviously I have seen people in the trade, like yourself i assume, buying them and Newey eyre in london used to supply them for the now Defunct Leb, plus the carriers fit most Ryefield boards.
The thread would be a bit tedious if we all said we had seen Qualified tradesman buying there relevant materials for there job.