Phil & Liz like to get 'Ride of the Valkyries' blasting out the loudspeakers and strafe joggers in Regent's Park.
Ackworth you have made a grave mistake assuming the aircraft you saw was carrying the Royal Family. You must do the honourable thing and kill yourself immediately Speed style. ****
Now I know you're hallucinating. The Royal family wouldn't go anywhere near New Cross, not even 12,000 feet above it in a helicopter. It must have been Old Bill mate.