Per post #855 , just called at T-72 and pushed through a C to J GPU on a 3-class 763. No issue at all except agent checked to see if there were also any other GS ahead (there weren't). Snagged 1K. GF Lounge in LHR followed by 1K to ORD followed by Polaris Lounge pre-connection to IAH is about the best UA has to offer system-wide, and all in one itinerary!