Came to this thread few weeks ago about my electric supply tripping intermittently for the last 3/4 years. Other day it completely cut out and another house further along.
Electric company came out straight away after a brief phone call (no waiting).
There was a few of them working on it, digger there also. Transpired it was a pipe/cable just outside my garden a few feet below ground that was at fault.
They fixed it in a day and it's been fine so far

I should have called them years ago as I could no longer use my lights as they flickered so badly and contributed to the supply tripping and they said flickering lights would be a priority.
Oh well, I suppose the electrician who checked my home a few months back was right when he said nothing was faulty indoors.
Such a bloody relief after all this time to have a normal electric supply!