If that’s the case, they are being generous allocating 22 flight numbers to BHD (1390-1411) A random selection of dates across W2526 gives between 5 and 7 rotations daily.

IIRC BHD inherited the old BFS flight number range when the route came to BA during the bmi takeover. In its peak it had 8 rotations with bmi (plus 4 with EI, now gone) with numbers BD80-96.i always found it odd that the BA numbers haven’t always been sequential (even accounting for the first flight of the day having a high number as the return of the previous night’s rotation as the route is now “run” from the London end with no BHD base).