Thanks as ever, chaps. Quick update as I sip a glass of that fine Purcari here in WAW: a lady came to the lounge a few minutes before boarding (SJJ-WAW), she apologised, handed the boarding pass for the AMS flight (new seat) and said that the issue was due to “aircraft swap” (not sure as it’s still showing E95…). As hugolover correctly states, the SJJ-issued boarding pass won’t work at the lounge (WAW), I had to go and get it swapped at the transfer desk as the app stated “Acceptance Closed”.

G