Originally Posted by
johnaalex
AFAIK there is no way to access the T3 Lounges without a BP for that terminal.
I haven't tried this situation but I know that the CX lounge computer is clueless about any information in regards BA flights. So I assume the computer just checking if the BP is valid for that day or not. Of course the lounge agent might point you out that you are in the wrong terminal. BA T3 lounge will defiantly won't let you through. Also it's too much risk, in regards connection. You won't get ready to fly sticker in T3 for your Oslo flight so the question is what time you want to move to T5. There is a 35 min conformance check in T5 plus you have to go through security etc. Depends the time of the day and you miss a bus and stuck behind a long security queue and you are in trouble. For me it's way too much risk plus loads of extra time and would gain not much.