You're missing out a lot of the wiring. Fair enough to omit the earths for clarity, but in your photo I can definitely see 4 conductors in that switch box, but your diagram only shows 2....
Also your diagram shows 2 switches, but you've only mentioned 1 so far.
BTW, have you studied the info here: http://www.diynot.com/wiki/electrics:lighting?[/QUOTE]
The first switch is in the other room
