Originally Posted by
IverTheCat
The reason why I ask is because I am BA Silver but flying on another airline out of Terminal 3.
Really would have liked to use the lounge in T5 pre-flight!!
As per oneworld rules, you can only access a oneworld lounge if departing on a oneworld carrier.
http://www.oneworld.com/ffp/lounge-access
There are three oneworld lounges in T3 (AA, BA, CX), but standard oneworld rules apply.