I recently ( 2018) bought some 8mm Cine films off eBay & this was amongst them.
It shows The Blue Chips performing Aerobatics in their Chipmunks. Interestingly one pilot is RAF & the other is Navy. This clearly dates this as the 1972 Team of Flt Lt R.K. Foster & Lt N.W.Thomas ( RN )
The Blue Chips were a 2FTS Team based out of Church Fenton
Other films include :-Linton Blades ( 1972) , The Macaws (1972), Gemini Pair, The Poachers , The Red Arrows & The Red Pelicans.
Unfortunately the films are without sound.