Originally Posted by
anabolism
One hour is an illegal connection (EF shows 1:30 as MCT for all international inbound flights to LHR), so it should be very easy to get switched to the earlier flight for free (even exchange) as an involuntary change. Since you are EXP, your best bet is to send AA a Twitter DM. If you haven't DMed them before, mention that you are EXP. In the DM, give the PNR, say you have an illegal connection in LHR and to fix it please move you to the earlier 3:50 flight LAX-LHR.
No, the MCT for a T5-T5 connection to BA is 1:00, so it's legal.