Looks like it was maybe a system glitch. EF shows availability for both legs in CE (albeit I and R need to be used). Looking at BA's website now, it seems too picking up the sectors without issue.
BA 771 ARN
09/02/20 7:20LHR
09/02/20 9:15319
Su,M
J9 C9 D9 R8 I4 M9 L9 V9N9 O9 Q9 S9 G9
BA 1334 LHR
09/02/20 15:15NCL
09/02/20 16:30319
Su
J9 C9 D9 R8 I0 Y9 B9 H9 K9 M9 L9 V9N9 O0 Q0 S9 G0
Last edited by cwagsg; Aug 8, 2019 at 3:00 am
Reason: Typo