Chiglet, hope thats not sour grapes! I think you'll find they cancel it at the drop of a hat regularly, or was it just once since it started. That was due to a major festival in Pakistan!
I think you will find Bradford has the largest Pakistanni comunity in the UK so it's no surprise that when Shaheen started ex LBA the MAN PIA loads dropped off.
PIA jumped on the route when Shaheen had ac leasing problems, but unlike them they have stuck at twice weekly so as not to hurt the MAN operation too much. Shaheen were 4 weekly before their ac lease expired.
Rumor is Shaheen want to recommence ex LBA!