Thud105 asked:
So, does anyone know exactly why the recently promulgated interception procedures do not comply with ENR 1-12-1?
Yes, I do.
The procedures do comply with ENR 1-12-1 provided the intercepted aircraft complies. ADDITIONAL (not different) procedures are published in the CAA notices for actions after the initial intercept, if the intercepted aircraft doesn't comply - this is to allow for the various other options such as holding up the follow-me board, so there are more opportunities to comply before the use of force!