Ok, so I might well be 'Mr Thicky', but I have a few points/questions.
According to the link provided on:
http://www.pprune.org/forums/showthread.php?t=291637
we will only start ordering JSF in any quantities in FY 2014, for delivery in 2016+. Now I'm not sure when we pay for aircraft, when we order then or accept delivery? So when exactly are we going to order/pay for Tranche 3 of Typhoon? I don't know, but would have thought it before 2014/2016! JSF orders/deliveries, and therefore presumably payments, go on until about 2027 according to the link - by which time Typhoon should all be in service!
It strikes me that this is just about saving money period! And the arguement about JSF vs Typhoon is just a typical Sir Humphrey smokescreen!!