My mother is in the process of purchasing my late gran's house, and had an electrician out today for a C.O.C. She was told all the light switches need to be replaced.
So I purchased a couple of LEAR light switches from a big supplier in town and fitted them. But then I was told, "new legislation requires that all light switches be earthed."
uhm, ok. These brand new LEAR switches have a plactic backing plate, and no seperate earth connection.
The old switches, however, were all metal, with metal screws into the metal box. There's no dedicated earth cable though, but I'm sure the metal box + metal screws + metal backing plate was good enough earth, yet "they won't pass C.O.C"