I dont doubt the 321 to be an economical machine, just doubt its suitability for some UK ex departure missions, particularly to the Eastern Med and Egypt. The 738 is better suited to these routes. I think the 737-900er an excellent aircraft and am only sorry no UK charter airlines has looked at it, other than XL. as it would be great for Thomson as a supplement to the 738, offering more capacity than the 738 but at not much more operating costs. Of course the range problem creeps up again. I still believe the 757 was the ultimate for UK charter carriers being at home on short or medium and even some long haul from regionals, albeit with a Bangor tech stop.