Brilliant, thanks guys (thats male and female!) It works a treat now! (I hadn't recorded accurately the terminals and forgot about the additional terminal block for the neutral - I'd logged it as a terminal on the switch!)
I am in process of lowering a ceiling in a bathroom. I made a note of the wiring to the pull switch but clearly made a mistake when rewiring! There are two twin and earth cables leading to the pull switch. The switch has 4 terminals: Earth; A1, A2 and Com. All were used when I removed it but I canno...