CAC speaks the truth. This year there were two from the flight test engineering graduate course.
I don't know if the Cranfield Master's option is open to the pilots, although if you don't have a bachelor's degree (or some other fairly serious grounding in applied physics), the course would be a bit tough. Having said that, the more knowledge a TP has about aircraft dynamics the better, i would venture.
While JF is correct about 43% of schools leavers going to uni, the bachelor's degrees they study for are not nearly at the academic level expected from a postgraduate master's student at Cranfield. (and I'm not sure that 43% graduate anyway)
How many would pass FW or RW at ETPS? Depends on how many can fly to begin with I expect