Not strictly a flypast but------
In the late 80s, Chivenor was tasked with providing a 4 ship at an army firepower demo on the Salisbury ranges. An instructor, an ex bona jet mate, was appointed to plan and lead, with much banter he chose 3 other ex mud movers as 'we don't want air defenders getting in the way'.
Come the day, much more mud moving banter at the outbrief. As they walked, the duty auth held them with 'M******** is this the task that's in the diary for yesterday?'. Red faces all round, just a mere 24 hours late.