Free drinks with BA business class boarding pass
Starbucks free if you are a passenger traveling in BA Business class
Free everything with a BA Gold card.
It's a franchise so they don't take Starbucks cards and you will not earn Starbucks star points!
The coffee was great although it took me a few minutes to get sugar and the guy who served me never bothered to direct me where to get it.
If you're traveling BA first or business show your boarding card to get free coffee/snacks. 15 £ worth, I think.
Freebies for frequent flyers - best lounge @ T5