I think chippy63 may mean First and Terraces. IIRC, the First lounge is pretty new and reportedly pretty good, just rather lacking in the window department. The Terraces is a two level affair; I prefer upstairs.
To get to the lounges, go through security. Turn left and go to the far left corner of the departures area as you are then looking at it. You should then see signs for BA's and DL's lounges, which are approached through the same corridor.