Funny old thing - remember sometime ago when Sky covered the closure of South of England due a power outage/computer glitch - they used the same app and the RF was clearly depicted for all to see - coming into shot from Aylesbury?
Wonder why DM thinks it is a concern now?
It has been a concern ever since RF flights have to share their flight details.
Personally, I think such a 'significant' Royal flying for an Air Ambulance is self-indulgent.