Just for my information what councils will not allow 3 plate and what are there legal reason for this, because I can't believe this as it's crazy.
It may just be councils in my area. The reason given for this was as there is no live at the rose it reduces the chance of an electric shock if someone unqualified decides to change a light fitting
And as far as quoting a metal conduit system this is totally different as no one in there right mind would wire 3 plate , this is more commercial. Where as 3 plate is for twin and earth Wiring and not conduit wiring.
I did not quote a metal conduit system try reading the post properly! alot of older properties still have the "old" grip conduit at the switch drops it's alot easier to use this in most cases than chase out walls
Are u a commercial sparks by any chance.
You sound like a union man that has lines of demarcation I am an electrician the fact that I do commercial as well as industrial and domestic means I am not pigeon holed to one sector of the electrical industry as seems the norm these days for alot of electricians. Few electricians these days get experience of the whole electrical trade and even fewer take time to diversify into other related areas like data, communications, alarms (intruder and fire), CCTV to name some that I have gained experience of in 35 years in the trade