I have a 6:45pm LAX to LHR flight with one hour layover to BA flight to EDI. I want to move the LAX leg to the earlier 3:50pm flight. I’ve been told that they cannot reprice this since the EDI flight is BA and fully booked. Is there any way to move the flight? Should I try to go to the airport early to see? I’m EXP (and would like to use a SWU if possible too)