Fixed Wing Royal Flight information is notamed and available on line.
Perhaps you are looking under the wrong "title".... Purple Airspace was junked several years ago. Fixed Wing RFs when operating outside of permenant CAS operate within Controlled Airspace Temporaory better known as CAS (T).
As well as CAS(T) being notamed you will also get details on CAS(T) on the AIS freephone number 0500354802. On that line you will hear reference to Airspace Upgrades....That is CAS(T)
Royal Heli Flight info is not notamed for security reasons and as far as GA ac are concerned normal rules of the air apply. Mil ac have avoidance criteria but that doesnt apply to GA.
DD