Originally Posted by
marwanb
If you're referring to Fastrack through LHR immigration upon arrival, then you are correct - only available to F&J customers; if you are referring to Fastrack security lanes at LHR then that is incorrect, I use those lanes all the time (and I travel exclusively in Y or Y+) based on my BA status. I do not know if this is a BA benefit or a Oneworld benefit though.
In terminal 5, I have been told several time that this is only a BA benefit and was directed to go the the regular security line after showing my AA ExP card and/or OW Emerald on the boarding pass.