Right, two things, firstly KLM aren't going, as the KLM1537/8 is soon to increase to an F100 from an FK70 (albeit only for a few weeks) - they also have slots at Schiphol for a fourth daily rotation, even though they haven't used them yet.
Secondly, and I'm not sure I should be revealing this, the airshow traffic will be at MME this year - Northern Aviation have agreed to handle them. I'm not sure of the exact circumstances, but I think the airport itself said no, and Northern Aviation said that's not acceptable - we'll look after them.