Common Sense
This is mostly just common sense. I wouldn't fly my drone within the 5 mile boundary of any major airport including approach/take off zones. I have on occasion called the ATC tower of local airports (Blackpool, Sheffield etc.) to let them know that I'm within 5 miles but not flying above 400 feet.
The 5 mile boundary of Heathrow airport overlaps most of the south of Hillingdon but the 5 mile boundary of RAF Northolt also overlaps most of the north of Hillingdon effectively making it one giant no fly zone anyway.
I guess this all comes down to experience and educating people without being condescending. NATS are doing a pretty great job engaging people on social media but they could be a bit better at offering starter courses to people instead of pushing training with a massive price tag attached.
Biting the hand that feeds IT
