score:5
As of January 2015: Lounge = no, basic refreshments = yes
There are two pertinent BAEC FlyerTalk threads covering this:
Based on that, until the new terminal building is finished at some point in the next year, there is no lounge that BA is using. (BA aren't using the Swissport one). On arriving at the terminal, you'll clear first security, then get to checkin. After checking, you'll then go through another set of security. Finally, after that, you'll be directed to a waiting area at the gate.
If you're flying in First or Club World, or have suitable BA / OneWorld status, you'll be directed into a different seating area. In here you'll apparently find a trestle table with some refreshments on. Looks to be snacks, some soft drinks, some booze, and some newspapers. You can find photos of what it was like a few months ago in the threads