No that's me. I'm doing some bits myself but not the stuff that needs to be signed off. I'm chasing walls and digging channels because some of them I have to before fitting the units.Fair enough, but it seems clear the OP is doing the work himself if you read the posts, no issue with that but I would prefer it if that was stated rather than wool being pulled over eyes over alleged electricians.
The oven isolator I'm having gold sockets and don't really want a giant oven switch ruining the aesthetics, and then I'm having two ovens so didn't want two switches, hence why I bought a 2 gang. I don't want the electrician turning up and sticking a horrible white stock thing up hence I'm getting all the gear ahead of time and wanted to make sure I have the right stuff without pestering him every ten minutes.
The plumber came and had to go to the merchants to buy all the stuff he needed so I'm trying to help cut all that out.