Made a discovery but don't know if it helps?:
with rocker switch pressed in at bottom - nothing at either switch BUT
with rocker switch pressed in at top - lights come on and will switch off at
2nd switch
DONE wiring as below but it is just working from the switch with 2 cables.
Any other ideas please, loathe to admit defeat!
Red and Black cable-
Red to L1,
Black to L2.
Red, Blue and Yellow cable at both switches-
Red to L1,
Blue to L2,
Yellow to Com
You are right about interesting!
Both rocker switches work fine when wired one way. Checked wire colours repeatedly, all good. Not got one of those testers though but have got little screwdriver with neon light?!