It seems perfectly reasonable that the MOD should take all reasonable steps to keep the public informed of LF activity. The information is already there at the LFB Cell, so why not make the public aware of what is booked to fly in which LF areas?
As for the security implications, is our Middle-Eastern accented one more likely to do his hostile deed:
a. Near a helo unit, where sighting an airborne helo is guaranteed
or
b. In the wilds of a low flying area, where a helo booked to fly may or may not fly within range of him?
Get real.