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having a pygmy lamp (or any other light fitting) attached and connected to a fitting internally that has not been `factory` fitted is considered as incorrect,
Ah.... For some reason I hadn't cottoned on to the fact that these started out as non-maintained fixtures. Maybe it's because the color-coding on the wires to the BC lamp holder in the first one appears to match that of the (what I had assumed to be) original wires to the PC board.

Looking at the connections in the second fixture, it's clear now that the holder has been added.

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the use of incandescent lamps within emergency lighting fittings is now also not allowed,
I hadn't realized that, but this isn't an area I'm involved with (funnily enough I've just installed two new emergency lights, the first I've had anything to do with for ages).