Whirly,
I can confirm that this is true.
'25 air exercises' (NOT 'flights') was how I removed my restriction in May of last year. According to the hand written note that I got from the drone in the CAA, I was effectively the test case for the new system. (My application was initially rejected until I brought to their attention the TrainingCom with the relevant details that had been issued by their own department!)
According to my records, it took me 12 flights to fulfill the 25 exercises.
Johe02 has got it wrong.
B73