Originally Posted by
jedison
Sorry if this has been addressed elsewhere, but a search of BA and OW forums didn't turn it up.
You wanted to look at
The all new and updated Ultimate BRITISH AIRWAYS Guide sticky at the top of the forum
Under the
Lounges and Lounge Access section....
Originally Posted by Sticky
'7. Lounge access for connecting passengers
Passengers travelling inbound or outbound in First, Club World or Club Europe on a British Airways flight have access to the applicable British Airways departure lounge prior to their onward flight, regardless of class of travel - so long as travel is on a BA or oneworld flight.
British Airways lounge access also applies when travelling inbound in First Class or Business Class on a oneworld carrier.
For example: Travel Chicago to London Heathrow on AA in First Class arriving LHR T3, departing on BA ex LHR T1 to Stuttgart in Euro Traveller. Passenger is entitled to use the BA First lounge upon production of their AA boarding stub and onward BA boarding card'