Switch1 - C=red, L1=Blue, L2=Yellow
Switch2 - C=red, L1=yellow, L2=blue. (Link cable from switch1)
L1=Blue, L2 Brown (wiring from existing lamp ?)
I wired the new lamp directly to switch 2, L1 & L2.
L2 on switch 2 appears to be live all the time.
I\\\'ve added a wall light and wired it up to the existing 2 way switch. Now when the wall lamp is lit the original ceiling lamp goes out and vice-versa. I connected the wires from the lamp to L1 & L2 on the switch. The blue & yellow wires are connected the other way round on the other 2 way...