Yeah, I had a read of it earlier, and again it is open to interpretation.
The way I read it (and always have) is that the main items of use are to be between 450 & 1200mm from FFL, so switches, sockets, fire alarm call points, doorbells, intercoms and that sort of thing. Not needing to be between 450 & 1200mm are things that are more for maintenance than daily use, like spurs for cooker hoods, control switches, alarm panels, consumer units, smoke alarms and the like.
If you had CU's between 450 & 1200mm you would also need to bring everything down to that level, including the smoke alarm reset/hush buttons, fused spur for the alarm panel and cooker hood, fan isolator etc.