It used to be Purple airways when I was a lad, and I remember returning to WW after one was supposed to have ended, but got a red light from the tower to stay away (no radio then!)
Saw HRH take off with his RAF instructor in a Dove, and head away from the field. Got the green light to return and did an overhead join only to find HRH heading straight towards me a pattern altitude over the field in the wrong direction! The two seat Tipsy was a very agile aircraft, thank goodness!