Just would echo what was said about the LHR EI lounge, it stinks you were denied but honestly you missed absolutely nothing. I went there a couple years ago doing a ORD-LHR-DUB connection (Exec Plat on AA, was nice, they bumped me to F for the flight) and was suitably amused by the huge number of uncomfy seats, lack of any technology, assistance by staff, or anything resembling food - and, as was said, the only thing impressive was the bar with the upside-down 1.5L bottles of some serious hard stuff with taps waiting to be opened. Given it was 7 in the morning I passed.