Amazing how sounds bring back memories. Just finishing cleaning the car yesterday (it had to be clean as I was driving to attend a Remembrance service today!) and in the sunny Lincs skies above at about 800 to 1000 ft was a lovely "Chippie" (silver with yellow trainer bands) flying north to south. Very nice to see and hear one again. I flew chippies at Plymouth (Roborough) during my RN flying grading course 30 years ago but time stands still when you see and hear one even now!