Fair enough.
You're welcome. I imagine that NC would have to agree (since it's obvious!!) that the issue was in no way electrical. Furthermore, they also have an interest in the fire-related parts of the Building Regs, so IF all of us here are right, then they presumably would be able to confirm that 'fire-rated' downlights were not required in your situation by the current regs, anyway.
Kind Regards, John
I called South Gloucestershire Building Control and they were very helpful. They are going to get the surveyor to get in touch and also forward the EICR from 5 years ago which they should have on file.