What I thought was a bit of a con, though, was him charging once for the appliance and again for the lead. If the lead had been permanently fixed, there would have been only one charge
I was under the impression testing (charging for) removable leads separately was standard practice.
I'm assuming you got a sticker for the lead too? The lead is technically a separate piece of equipment
I don't know the regulations, but was told that last year the whole thing was treated as one appliance. Perhaps the rules have changed since. I can see the sense in what you say, though.

