I have actually flown a light aircraft into Heathrow - but a very long time ago!
In the late 1970s I needed a long cross-country flight at night as part of the UK CPL qualifications. I had the use of a Grumman AA-5 Traveler at Liverpool so hit on the mad idea of routing in and out of Heathrow. Filed a VFR flight plan and on a lovely clear night just set off. Flew at 3500' and arrived there around 22.30 without anyone in ATC querying what we were doing.
Parked on the GA apron on the southside which was near what is today the Royal suite.
Then - nothing
The place was effectively closed so we had a short wander around until an ops vehicle showed up. He laughed when I asked about paying a landing fee and was there any fuel?
So we just booked out over the radio and departed to Birmingham to refuel. That bit went OK and eventually got home in the wee small hours.......
Never heard anything about it and never got a bill in the post
