Thanks everyone for your help, after a few more hours of trial and error (with lots of running back and forth from the fuse box), I managed to find a combination that means all 3 switches work!
Picture below if anyone cares. Now to sort the backing box
Hello, yes tried almost every configuration. The first was as you said as its most logical and then second was when I took the picture.
Thanks for your help
Unfortunately there weren't any instructions with the switch and nothing on the manufacturer (Caradok) or Sparks website. Will keep trying them.
Thanks for the help.
Thanks everyone for the replies. Unfortunately no instructions with the switch and nothing from the supplier (yet).
I thought it was an odd one but was hoping somebody may have a solution after trying a lot of different variations of wiring. I will keep trying the supplier.
Thanks again.
I have recently had an intermediate switch fitted by an electrician. This had 4 terminals labelled from top left (clockwise) L1, L1, L2, L2 and it worked a treat!
I've bought another intemdiate switch to replace this...