What a cluster.....
I get a new boarding pass at the airport where I'm told for some reason an invalid BAEC # is on the booking. I get a new boarding pass with a big red stamp with "fast track" written on it.
I go to fast track which is unmanned in Basel. Do I have fast-track? Do I hell. Off on slow track then.
I also noticed that my details were manually taken down at the lounge whereas I thought they were normally just taken by scan of my boarding pass. Another BA passenger just had a scan, but it's possible she was in CE and so they didn't need to record things.