Thanks for taking the time to reply. You're info on the bonding was really helpful, thanks.
Apologies, I wasn't clear on the original. I don't intend to do it all and then rock up to a local electrician and ask them to sign it it off. I'm trying to get as much together as I can in advance...
Apologies if I'm repeating stuff that's been covered, I did have a look and couldn't find clear answers, especially as there is a water supply involved.
I want to replace the existing wiring in an outside shed with a dedicated feed from the house CU. Currently sockets and lighting in the shed...