I remember it well... Ruth and the kids came up and I stayed long enough to work it before tearing over to the car park to get up there and take a few pics. Unfortunately I dunno where they are!
The Sandringham pics brought back memories. It was lurking around the London CTZ and a colleague offered it an approach to 09L. I was the Air Arivals man and it did a run and then turned left over the M4 towards Leavesden. Took me a while to find it, it was so low - about 10 ft off the deck. The AFS rang up saying they wish I'd belled them so all of them could see it. God knows what it must have looked like on the M4 - it went over there at about 100 ft! Wish I knew what date...