Basically you walk through a door next to cafe Nero (!) it's two double doors from memory and discreetly yet well signed.

Then you turn right, walk down a corridor and enter door (marked) on left. Inside is/are:
- a view of the apron
- computers and printers for listing
- chairs
- BA staff member
- FIDS telling you where to go next

You can stay or leave the room after listing. If you stay the FID will alert you to go to next room to the blue or the red desk, I think blue was bag drop and red was info (i.e. danger bad red). Otherwise if you leave the room and have your cell number in your listing, it will text you and tell you to go to the red or blue desk.