This H&S cr*p about luminous instruments on a one-off inspection is a masked load of codswallop by folk with little to do.
What next; somebody next to me in the bus sues me because the got cancer from my wristwatch??
I fly a number of old a/c with luminous instruments and just like those who flew them in full-time service haven't started to glow yet!
The poor girls who painted the faces as a job are another matter; my heart goes out to them and their loved ones.
BTW I'm told that the GBP500 or so per year for museums to own and calibrate a Geiger counter to check instrument radiation will send a few under if somebody doesn't see reason soon.
In this case; "Only in the UK!"
G'day