I blew a 60amp fuse in November ( didn’t know it was 60 as it was hidden by previous owners building work) there was an 80 next to meter.
National grid were very good, at the property within 2 hours of me calling.
I was pulling 21kw when it blew.
They moved the meter outside and put a 100amp in but put an 80 amp in the sub main right next to the 100amp.
Electrician is going to swap it for a 100 as it’s within 3m of the fuse board so wasn’t needed.