Primarily for general aviation discussion, but other aviation topics are also welcome.
By WhoWhenWhy?
#1893621
The bit about remaining outside until your call has been acknowledged was already a requirement in the old airspace policy statement on RMZ (much of which was replaced by this ORS9) and (I think) in CAP 413.

The new bit here is the reference to the use of ADS-B which has got to be welcome. The kit at a number of air traffic units can use ADS-B, they just need to switch it on.