I thought R2 is a dead test? (As is also an R1+R2), you shouldn't be getting a tingle
Yeah, I was being lazy as torch was in the van, and it was late in the day.
It was the merest tingle, and as I wired and ran cables and all IR tests were good I felt all would be ok. Me wrong!
50V is touch voltage. So it's more than 50V. The RCBO does not trip but tests fine also.