Ok well that's something at least, my planned trip is back from LGW so hopefully that will be ok then. If I had my head screwed on I should have asked in MUC last night at the lounge if they accepted Silver cards!

I remember noticing one of the last times I flew from ORD that the lounge receptionist (or dragon as they like to call them on the BAEC forum) had allowed in a fair few aerclub silver card holders (she had a list open where she was writing names and status for EI). At the time I put it down to her not knowing what status was and was not allowed access (as she had told me before that she did not know what status meant what in EI - plus BAEC Silver is mid tier allowing access to add confusion) but now maybe given what it says about access to and from US destinations maybe silvers were admitted correctly.