Yes, you can. But it drew some weird looks from the lounge person, and she kept looking at the BP. I asked her what she was looking for, and she said ticket number. I didn't know airlines printed ticket number on boarding passes, and was about to make a sarky remark, but decided to let it go.

She then went away to confer with a colleague, but came back saying we could go in. Although she pointed us towards the Club lounge (we do have Gold status), and said lounge closes at 19:15 - an hour before our flight was about to leave. At 7:20 we were indeed asked to leave.