Hi! Apologies in advance as this post isn’t really BA related… but given BA rule supreme at LHR I figured this would be the best place to get some LHR T3 intel.

In a few days I will be arriving into T3 on AY and then transferring to T5 for a BA flight ~2.5h later.

I’m sure I remember seeing someone mention that there’s a way to re-enter T3 departure after landing as an arriving passenger?? If this is true would someone mind sharing the process? I’d love to grab an hour or so in the CX F lounge as I’ll likely have the time, before heading over to T5. Also on that note, as my onward flight is from T5 is it easy enough to get from T3 departures to T5?

Thanks!!