CabinCrewe
Now slightly off-thread:
Ahaa, "alles klar" now, thanks for that. Yes indeed, was much appreciated, but even when we "tried it on" to get into the lounge at MIA, the nice (not sarcasm) BA check-in guy at MIA regretted that we didn't qualify for the lounge at T5 either!
Although before departing GLA we'd seen on the BA website we would be "lounged", nothing on our printed ticket paperwork confirmed it. Although we'd used the lounge at GLA outbound, we were then fearful of a bit of a "stooshe" (Scottish word, try google!), during our return through T5, but it must've been coded onto our boarding passes - so no problem, phew!