(06 Mar 2016, 8:33 pm)Dan wrote But what you're doing by mentioning reasons a bus may be off service is justifying a wrong brand/vehicle type allocation.
It shouldn't happen, but there are times when it will have to happen.
Completely understand the Solo allocation, but there's no reason for 7489 to be the preferred output on the X93.
I'm saying 7489 would be the preferred output on the X93 should they be 2 B9s off the road not when they have all 6 available and at Whitby (as the sixth one has been spotted on the 64/64a once or twice recently).