You haven't had a reply so here is my opinion. I'm not an electrician just an electronics engineer. If in any doubt get someone in to look at it.

Quote:


That sounds wrong. Typically power comes into the switch on a live (brown) wire, goes through the switch (when its on) and then heads off to the light on the switched live (blue sleeved brown). So you would only expect switched live to go to the light you want that switch to control eg not another switch.

I can't be certain but it looks like you have two cables:

1)
Brown  
Black (sleeved brown)
Grey (sleeved blue)
Earth

2)
Brown
Blue
Earth


One of the Browns is probably a permanant live. I can't be sure which one (probably the one in cable 1?), this should be connected to the COM of both switches.

The other Brown is probably a switched live to one of the lights (connect to L1 left)

The Black (sleeved brown) is a switched live to the other light (connect to L1 right)

The Grey sleeved Blue and the Blue wire are both Neutrals (connect together in the terminal block).

The two earths should be connected to the screw in the metal back box (done) but there should also be a link from there to the earth screw on the face plate if that is metal. The link should be sleeved yellow and green. Check other face plates if you've just done them all.

Has the outside bulb blown ?