On Thu, 25 Jul 2019 15:07:46 -0700 (PDT), wrote:

[snip]

Funny how peple always seem to recommend you give them money. We await the pics.

Right-o, I'm back from visiting and here is the pic of said consumer
unit:

http://www.littletyke.myzen.co.uk/sc-consumer-unit.jpg

This was installed in 1996.

Meanwhile, the electrician found the fault. It was burnt insulation on
the cables to the halogen ceiling light in the upstairs bathroom which
caused the wires to short.

Thanks all for the handy tips!

MM