I’d have gone through the agro for £8. For £800 plus cost of CU etc, I’d have been camped outside head office pestering like that plank in Westminster with the megaphone!
There's a bit more to the story that I've stated. This was a 40kVA single phase supply that was connected to a bigger than normal service head, rated either 200A or 300A max. This was connected to an old rotating disc meter, officially rated at 100A max.
Tails were 35mm, the fuse must have been at least 160A, and everything had worked happily for decades.
Enter someone to change the meter (expired calibration), who must have reduced the size of the DNO fuse to match the new meter, so 80A or 100A. This, of course, resulted in frequent power failures, where the fuse had popped, eventually culminating in the fire, when the well cooked head finally cried enough.
The eventual solution was to fit a polyphase head, with two fuses connected in parallel to the incomer, and connected to two channels of a three phase meter. The metered output tails then went to a large Henley, and on to the original wiring.
I turned up on site just as they were finishing this, to sort out the damaged CUs (which were actually Wylex 160s to two sub mains), and pointed out to WP's cowboys, that the four 16mm2 tails, with all their insulation burnt off, that were running horizontally just a few mm above their newly fitted meter board, had been live (from a 25kVA back up generator) all the time they'd been working.