Sorry, I was tired last night and wanted sleep.
old > new
Blue > N
Brown > L
Grey > 2
Black > 3
Green/yellow > earth
Depending on your wiring, it should be quite straightforward to alter it to allow the nest to control.
old > new
Blue > N
Brown > L
Grey > 2
Black > 3
Green/yellow > earth
Depending on your wiring, it should be quite straightforward to alter it to allow the nest to control.