Curious on whether access to Flagship Check-in @ LHR T3 is allowed when on AA operated flight but with a BA flight number/codeshare? For EXP access (my wife is EXP), the requirements from AA.com clearly say:

"You can use Flagship® First Check-In if you’re flying on qualifying international flights operated by American (regardless of cabin)"

So the flight we are considering is indeed operated by AA which clearly meets the requirement if I take it literally. But I also know that people seem to have varying experiences with Flagship Check-In rules not always being honored and I'm a little concerned the BA flight number might throw a wrench in this situation.

Does anyone have recent experience with this scenario?

Regards