The pictures in Genius1's TR are of the AIR lounge.

There is another lounge accessible to BA pax: the JET lounge. It's located just before passport control on the floor above duty free. Like the AIR lounge, it can be hard to find if you haven't been there before - there are a small inconspicuous staircase and lift that take you there.

Food is the same in both lounges (a small selection but usually very good indeed), drinks I think are the same too (although the JET lounge may have a bigger selection). Both lounges are IMHO colourful, modern and perfectly adequate.

I could have sworn I had pictures of the JET lounge somewhere, but it seems I don't - personally most of the time I just head directly for the AIR lounge because it's a little bit closer to the gates (and after passport control, not that that ever takes long).