Doorway turned into an archway, houseowner had lighting off as they were changing switches around so nothing was noticed at the time, but also the cpc to this new metal switch (unseen) wasn't connected to earth. End result switch front plate live 230v, exposed plasterers mesh at bottom of the archway 230v. Few shocks received by a few people, myself included.
Is this a common thing to see from plasterers with their nails?