They flew directly over head my home in Cheam Surrey. I heard it before I saw it, I knew something was amiss by the sound then I saw how low he was, then I realized how slow he was, I estimated 1500-2000 feet poss 160 kts, I watched him heading approx 360 then a left turn probably to intercept the localizer overhead the city (Waterloo/London Bridge?) for 27. My first thought was he had been bound for Biggin Hill airshow.
It was controlled (obviously), but alarming, the sound just wasnt that syncronized (single engine op) and I was pleased to read all ended safely, another job well done to Professionalism.
