Thanks a lot everyone 🙂
I am using an EOS 300D with Canon EF-III 75-300mm F4.5/5.6 lens. The lens is a stand-in until I have decided what proper lens I will buy. My old 100-400 broke down some time ago and the 75-300 placeholder is quite poor for airshows.
And yes, the Spit was indeed landing (at supersonic speed so it would seem :D)
PS. Notice the gathering of flies(!) on the shadow side of the white fuselage stripe of the Mustang – visible as dots on the first photo. I guess they were happily waiting for the “ride” 😀