Excellent - thanks.
I'll try that.
Maybe I wasn't reading the instructions with my brain engaged (!)
I knew it should be simple.
I'll let you know if it works.
Thanks!
At the moment I have a simple bathroom light with a pull cord.
Insie, it has three wires; Red, Blank and Earth (which is connected to the earth point on the plastic surround).
I have in my hands a dimmer switch from Eterna (model DIM250).
It has the following connections available (this...