I was able to find three last minute (July 2025) J seats from west coast to LHR along with our positioning flights for 70,000 miles OW. Seemed like a good deal so I put them on hold. But that positioning flight has a 35 minute connection. It’s legal as it’s on a single PNR. I’m worried we will be downgraded on rebooking if we misconnect. Original booking is all AA metal booked with AAdvantage miles and next flight to LHR would be BA. I see that there is an earlier positioning flight with a more generous 2 hour layover also on AA which I would gladly revenue for. Should I call and ask for repositioning before ticketing or ticket first and change later? Would appreciate any suggestions