I'm trying the new European Business Class next week. Given last month's debacle where I was delayed on the M1 & subsequently missed my flight, I'll be taking an early train to London & should have about 4 hours to kill at LHR T2. Which lounge can/should I use? The SAS & SkyTeam websites only seem to mention the Lufthansa Lounge & nothing about the Plaza & SQ Lounges, are the latter two just for EuroBonus members? If so, as a Flying Blue Platinum, that would rule me out.