OK, let's see if I've got this sorted. The Northolt RMA is within the Heathrow CTZ, and therefore Class A. You cannot fly VFR in a Class A CTZ, hence a
SVFR clearance is mandatory for all non-IFR traffic. Standard separation applies to
SVFR flights.
However , within the NRMA, military controllers may deem
SVFR flights to be VFR, for the purposes of separation? Splendid!!
Only we Brits.........
