LHR-MAN used to be one of BA's most profitable routes a long time ago, but not so today. BMI can't rteally make it work and today's BA services are a shadow of what they were, because of fierce competition from the train (Virgin as it happens at present). With a service every 20 minutes and a 2 hour journey time city-to-city, the airlines can't compete for domestic travel. A large part of the LHR-MAN is now connecting traffic.
Therefore, (sadly) MAN is not a prize worth winning (or giving).
EDI might be different!