"Owain" wrote in message
...
snip

Anyway, it only takes a moment to move a wire from a 16A socket MCB
to
the 45A shower MCB in the CU.


Yes, and I can really see a 80 year old 'Granny Mabble' doing that,
her replacing a 3A fuse with a 13A one is almost a certain bet at
somewhere....