I’m going to keep this one brief: stay away.
In a terminal in which your oneworld business class ticket can get you into the American Airlines, Cathay Pacific, and Qantas lounges (all superior choices), there is little need to use this lounge unless you enjoy the process of nomadically roaming, ready to pounce for a seat like a lion eying a zebra in the brush.
Perhaps I exaggerate, but the lounge was packed when I arrived in the middle of the afternoon prior to my flight to Bilbao. To be honest, I didn’t even know that BA operated out of Terminal 3…I even showed up at Terminal 5 only to be re-directed (via the Heathrow Express) to T3.
I like the blue mood lighting as you enter the lounge…perhaps the Kettle Chips inside. But that’s about it. There was no soup left and the sandwiches looked…well, British.
Here are some pictures:
I finally found a seat in the very back of the lounge.
Newspapers and magazines were available:
The infamous sandwiches:
Tongue and cheek aside, this lounge has the same cruise ships bathrooms as over in T5, does have a first class spa and lounge for “fist clause” passengers, but could not seem to muster functioning internet for me.
I didn’t have much time before my connection (oh boy, afternoon tea with the same sandwiches) and perhaps that was a good thing, though the herds seemed to be clearing as I left the lounge:
The lounge is open every day from 5am to 10:30pm. But I’d say go right to the Qantas lounge.