Originally Posted by
Internaut
Same principle as any other airline or ticket: It's the class of ticket that decides which lounge you go into, not how you came by the ticket. The only exception I can think of would be an operational upgrade on check in (very rare these days).
I had one of these the other day LHR-NRT, with "Invol U/G" plastered all over the BP. Didn't seem to affect my access to the CCR - I was both directed to the CCR at checkin and then welcomed into the CCR with a smile.