Why does it take two aircraft to operate the MAN-MCO a maximum of six times a week. Is this the average downtime for a modern(ish) aircraft, or is there a 'spare' sat about doing nothing?
One is a spare.
It was orginally to be used for MAN-BGI which operated once or twice, but now is spare and they rotate sometimes.
Watch this space maybe there will be 3 or 4!;)