British airways LGW-ABZ
Nothing better to do so put in a test booking for the above route,random dates with dep from LGW on 15th May and return from ABZ 21st May.
One way Northbound on all 3 flights was £216 (£48 on all 7 from LHR)
Southbound was £218 on all 3 flights but again (£48 to LHR on 6)
So roughly a return from LGW-ABZ is £434
but LHR-ABZ is £96
I would think that BA may use the "poor advance bookings" excuse as a reason to drop the route although with fares like that they obviously dont want anyone booking it in the first place