This site also shows all the military aircraft, as well as private and commercial aircraft - during the early stages of the lockdown, it was fascinating to see the military transports (Hercs, A400's, C17's etc) practicing their landings on beaches and airports like Gatwick, London City etc. Also the refueling tankers circling in the North Sea and the various NATO jet fighters having fun dogfighting etc!
Just had another bi-plane fly down the Test valley and return a little later. Radial engine sounded nice. Silver with dark wing tips but strangely no markings on the fuselage or under the bottom wing. Even looked at it the twice passing overhead with binoculars but could not see any markings.
I must get technical and explore the links posted
I called up the link immediately above and sure enough the plane shown on the link just flew over the valley.