I am sure this has been addressed already, but I couldn't quite work out what the conclusion was. I am flying LHR-EDI this evening, and want to credit the miles to my virginal BMI account. But I still want to be able to get into the DC lounge, using my UA *gold card. Will I be able to wave a boarding pass with a statusless DC number to the matrons, if I support it with my UA card, or will that confuse matters? Or should I check in using UA, and then change it at the gate (is that possible)?

Any thoughts?