Let's assume a friend has had a garage built, big enough that PP and BC are required.
BC have been to see the work-in-progress and sign it off so far. There's only one more visit required, to check the actual (flat-pack) wooden building now it's up, and to check the soakaway for the guttering.
Great so far.
This (competent layman) friend is planning on doing the sparks himself, with the advice of a newly-qualified sparky mate, who'd be happy to come and help but is a bit too busy for the next month or two.
The feed to the garage is coming from the house to a studio outbuilding, then on to the garage. There's a modern RCD CU in the house, there'll be a modern RCD CU in the studio (which is also going to be rewired, but probably not for a few months), and there'll be an RCD CU in the garage. This friend has no plans to move house for many many years if he can possibly avoid it.
So - what would you do...?
Would you get BC to sign off the building, and if they ask about electrics, just say there's no plans to wire it?
Would you just get on with wiring it and plan on getting a Part P sign- off cert to keep it all above board?
Would you just get on with wiring it, and hope that BC don't say "Well, we'll give you the building sign-off when we see the Part P cert"?
Would you just forget to call BC about the final inspection, and forget about getting the final sign-off?