Dimmer switch problem

[Djnikon]

Hi all,
New to this but just moved home and seem to have the same problem in 2 rooms with the same set-up.
In my dining room there is a centre ceiling lamp and 2 wall lights. The ceiling lamp is controlled via a 1 gang 2 way switch at one end of the room and also by a 2 gang 2 way dimmer at the other end - this works fine and the light can be dimmed.
However the wall lights run to the same 2 gang 2 way dimmer but can switch on and off but won't dim (and buzz really loudly in the process). These do not run to or from the 1 way switch and can only be controlled at the dimmer.
Would the problem here be that the wall lights are single way connected to a 2 way switch?
I also have the same issue in the living room with an identical set-up.

Any advice greatly appreciated.

 

[ban-all-sheds]

What type of bulbs are in the wall lights?

 

[Djnikon]

All bulbs are 40W conventional golf ball bulbs.

 

[ban-all-sheds]

Photos of the dimmer switch wiring would be useful.

 

[Djnikon]

View media item 36874 View media item 36875
These are the best images I could get at short notice. Hope they help.

 

[ban-all-sheds]

Can't see what's going on.

Possibly one dimmer being supplied with the output of the other?

But what I can see makes all of your functional problems unimportant.

You've got a metal switch with no earth connection, and the earth core of at least one cable being used for live.

I strongly advise calling an electrician now.

 

[Djnikon]

Thanks Sheds,
I am looking to replace the dimmer with a double rocker switch anyway now (after the wife said she hated dimmers) so would this give me the opportunity to rectify this?
Edit - 24/08 1346
Just noticed that the sleeved earth is connected to the rear side of the metal backbox...
Also found a MI for the switch and it seems to suggest that the terminals numbered 1,2 & 3 should be 1 - C, 2 - N and 3 - E... Never seen this numbering system before (having changed many switches and pendants in my old house (which ironically was newer than this old cottage).

 

[Djnikon]

Thanks to you Sheds, I looked at the earths. Disconnected the whole thing (after switching the whole house power off - of course) and reconnected it earthing it properly to a metal clip on the face plate so not having the earth core as a live and hey presto - two sets of dimmable lights.
However the wife still doesn't like it so will be replacing the switch with a standard rocker tomorrow.

Cheers very much - it's amazing when you get another view on things.