I recall going to a Hucknall Airshow probably in 1963 when a formation of four NUAS Chipmunks took part. This was led by Sqn Ldr Atkinson and certainly Flt Lt Sid Sterling was in the team. I would be guessing at the rest. As I recall these were ad hoc displays with limited practice. I also saw the Beagle 206 perform a very low slow roll, an aircraft I would later like to forget!