Quelle surprise
when was the last time you voluntarily fitted MK?
Probably ~15 years for me, and that was only because I like to fit consumer units that are pretty common rather than brand faith, and stopped when I found hagar could produce a unit that didn't all sqonk out of line when you torqued the MCB's up. I remember fitting their light switches (specified by a client because they're the best right? No? well you're just an electrician what would you know, I say they're the best!) in 2001 and the room with 14 GU10's made a big bright flash when you operated it, tried several, then managed to find a (definitely not second-hand sir) older version from before they had the tiny little mechanism.