Originally Posted by
alancostello
when you say vice versa, I’m Aer Club Platinum and flying BA LHR-DUB, can I use the BA Lounge with my AerClub card?
No; vice versa was meant to be interpreted as "between Ireland and Heathrow".
Aerclub status won't get you into any BA lounge when travelling on a BA economy class ticket - for that, you require the relevant status in a oneworld programme.