RGN-DOH-LHR
For my new route home from RGN-LHR this exact same issue is driving me dippy. I used to be able to connect on to QR1 allowing for a 6pm arrival into LHR. Now for pax originating in RGN we can't get to LHR before 8.30pm on the later flight.
It's an LHR thing. I can get a flight to MAN for instance with a 6pm arrival.
This is recent on this route. I've flown merrily over the last year on the QR1.