I’m hoping that long haul travel will be possible again by November so have been looking at options for booking a reward flight. I’m interested in a trip to Penang flying BA LHR - KUL and then MH to Penang. I can’t book the flights/cabin I want online as one booking and haven’t had any luck getting through to BA to book. If I book BA reward flights LHR-KUL-LHR online, can I subsequently call up and add KUL-PEN-KUL to the booking? I don’t want to make separate bookings because of interlining luggage. Thanks.