I think improvements in the standard of simulation also increase the number of squadrons that can be sustained from a given fleet of aircraft. Look at the F-35 for example: much of what it does will only be trained for in the sim due to security considerations, so the sim needs to be capable of delivering very high quality training. Applying that same simulation technology and philosophy to other aircraft types is going to help wring more out more productivity - fewer BVR air combat exercises over the North Sea means fewer hours on Typhoon airframes, for example. If the Typhoon planning assumptions were previously based on A sqns flying B training hours per month for C years to fly a lifetime total of D hours, then (assuming D is fixed) reducing B lets A and C increase. We've seen both of those outcomes announced in the last year or so!