On Sunday, 7 July 2019 09:33:05 UTC+1, Chris Green wrote:
Our house consumer unit is currently on a stud wall in the downstairs
loo, we are planning to extend the loo into the adjacent utility room
to make a shower room. Thus the consumer unit needs to move, it can't
be in a shower room and the wall it's mounted on is going anyway.

I replaced the original consumer unit with the one that now needs
moving so I'm not too worried about the basics of what's needed but I
do have a couple of questions:-

Some (quite a few) wires will need extending, I have suitable
crimps and crimp tool but what protection do the resulting joints
need? All the existing cabling is T&E laying between joists etc.
but presumably crimped joints would need forther protection. Is
heatshrink enough or do they need to go in boxes of some sort or
conduit?

I *guess* this may be Part P'able, I'm not too concerned if it is
or not to be quite honest but it would be nice to know as there
will be building inspectors around for other work that is going
on.

I'll be buying a new 18th edition all RCBO consumer unit, any
recommendations for good, easy to wire ones?

A friend is in the process of buying a house. One of the issues that came up on the survey was the consumer unit being in a shower room. Not just a room with a shower but a full wet room.

Luckily for him, he actually wants to change it into his "home office". (It is the only bath or shower in the house but it is on the ground floor. Very odd idea.) So he won't have to do anything about moving it.