Is it the whole electrics going off or just one trip switch
As a temporary fix, unplug (not just switch off) everything you’re not using - chargers, tv, washing machine, toaster etc - if that fixes the issue, you just need to work out which one is the problem!
It turned out to be a dodgy extenstion cable, no electrician needed!
The joy of the multimeter :-)
Sven - 07748907654. Professional, tidy, punctual and competent. His fees are also extremely reasonable. I know it is no longer required, this is if there are any further issues.