I had a layover at LHR a couple of weeks ago. My departing flight was LX. If I had known about the layout of T2, I would have gone to the Senator lounge. Instead, I walked all the way to the other side and hit the UA, SQ, and AC lounges. None of them were anything to write home about, but I have to commend the attendant at the MLL because she was the only one who told me I would likely be departing from the other side of T2 (I hate the fact that they would only reveal the actual gate 60 minutes prior to departure).