Hi Click, Roo, dhr90 and Kieth.
Your praise is much appreciated, thank you. I have to say that a lot of dumb luck was involved, I set AV mode and +1/3 I think and left the camera to it, there are about 150 or more shots in the trash for too dark or too blurred!
dhr, the two lines are from a zip wire, I was shooting from Bournemouth pier, they had a tower built on the pier and the zip wire to the shore set up on the display side of the pier, very few of the aircraft did anything other than approach the display area from the other side. Good planning from the organisers!