WESTIE - if you're there - are they not trained to inspect the ends of overheated cables, and to cut back if necessary?
As Steve said it was on his side of the meter so the DNO operative should actually never have touched it! But he no doubt decided on-site that the damage was not too severe (looking at the photo I would agree) that the cable could not be energised to provide a supply.
I've seen far worse than that re-used to maintain supply when needed