Wings & Things had 5 Harvards in formation last year. Phil Shaw led it with Maurice Etcheto on the left wing, Maurice Hammond on the right, Rob Davies in the box position and Chris Bellhouse just a little further behind. Chris normally flys a solo too while the others fly by in various formations.
I agree that the the tribute to Martin Sargeant a few years ago was very moving. The missing man formation brought a tear to the eye.