Bathroom fans and switching fusing requirements.

[Guitarist]

The main reason for light to continue working is so that you don't have to work with a torch in a non window room. Just trying to cover all options in one working solution.

The regs are a bit vague regarding requirements for fans other than isolation in general.

I personally think that the equipment manufacturers need to consider designing more suitable switched fuse units to accomodate some of these "assumed practices", such as more recent RCD'd FCU's. Why not have a 3 Pole switch with 2or 3 fuse units incorporated into it.
Safety and practicality should run in unison with the regs, not just meet the minimum requirements. Another example of recent forward thinking is the ashley J series junction boxes. These are just so much more practible than the old round JB's, which i find almost useless.

Maybe i'm being a bit padantic, these problems have been around for a long time, but some of the solutions are only just coming to the market.

A triple pole isolator is just that mate... an isolator, so that you can work on the fan with the light still on...
All that said, I usually have my headtorch on anyway