Its a shared lounge with AF
. 2B is an awful terminal. BA
check in is at the far left hand end.
You have to go through passport control before you get to the check in desks (although there are self service machines outside). The lounge isn't much to write home about, usual drinks and limited supply of crisps etc. The lounge is the raised up area in the middle of the terminal.
Shopping and eating opportunities are poor and there are very few seats in the terminal itself, you'll be fine in the lounge though. Security is just before you access the gate (each gate has its own security) and the gate is just that, an area of plastic seats, no facilities. There's no point being early at the gate as if all the seats are taken you just have to stand in a crowded room for ages.
On arrival, check the screens to see which passport control/baggage reclaim to use as there are 2 and there is no access between them.
Hope you have a good trip!