Gibraltar Defense Force questions

[3dg]

Hello
I've also put this in the Colonial badge section, ive put it here as the GDF were in affect Artillery.

I have in my collection a nice example of the Gibraltar Defence Force OR's brass badge. My questions are:

Is there a bronze or gilt version for officers?

Were collar badges worn, officers or OR's, if so does anyone have an example or picture?

As above but buttons?

Were there any other badges that were unique to the GDF? ie the red backed yellow key arm badge with AA either side.

Your help and time, as always, is greatly appreciated

Cheers