Originally Posted by
DaveReidUK
Had the filming taken place on a different day, there could easily have been L rather than R displayed on the tower.
Sorry you've lost me there....
I'm just guessing but it may have stood for 'Pilots Report Here' which has now been supplanted
Makes sense...searched for uk control tower photos in the 50s and the few I found most had no sign; some a C and none an R...