Just had an interesting experience at the Sofia Aspire Lounge. Flying BA Business, GGL, have a friend on partner airline who I tried to guest (wasn't sure if it would work or not, just hoped for the best)

Agent scans my pass. "Yes, BA Gold. OK. But no guest". Points to a chart in her binder.

I look at her binder. Says 1 guest under gold. No notes under Concorde.Just a big "X" "Ok, even under Concorde, no guest?"

She gasps. "Concorde? Is X. Not allowed. But I guess you're in Business, so you're ok"