Airbubba, I never knew that about the PanAm at Northolt - but I actually saw it on the approach and saw the subsequent take-off. I lived about 5 miles from Northolt. I was 11 years old.
Not only that, but ten years later I got to know the radar controller at LHR who handled them. He told me that they were landing on RW23 that day, and he asked them if they had the field in sight - after the affirmative reply, he handed them to the tower and concentrated on the next arrivals. The first he knew about the Northolt landing was when he received a phone call from an irate Northolt ATC who said - to slightly paraphrase the actual remarks - "One of your festering 707s has just landed here!"
Excuse the thread drift ....