Hello Will, and welcome to the forum!
For my sins, I'm an "unqualified electrician". I don't do it for a living, I'm a hotel manager. But I've always had an interest in electrics and I keep up to date with the regs and current practices. I'm constantly learning from the folks on here. I'd do it for a living but I have no interest in channeling walls and plastering over afterwards. If there was such a thing as a "domestic electrical design engineer" I'd apply tomorrow. Of course, I'm now buggered by part P.