Rapid Climber,
Being involved in airline commerce I will support Mr Angry from Purley - this bird is not earing enough money to pay the bills, even if it's out of EMA for 6 days. A300 needs to achive at least 250+ hours monthly to offer competitive rates (forget about a300 freighters utilization - they carrying much more profitable payload than pax - so DHL can afford it). I really doubt if any airline/broker will buy substitute or charter of a300pax if operator wants to cover fixed costs in 70-100 hrs utilization (I think that now Prime's bird doing about this fugure). If it's doing 1 roundtrip per day in average, it needs to do LHR-DXB rotations, not intraeuropean short hops.