Just purchased P3D V4 and was sad to see AI no longer throw shadows onto the parking areas at Wattisham, Coningsby and Duxford. Is there an adjustment I can make to rectify this or should I learn to live with it? Thanks for all your efforts everyone.

P3Dv4 can cast a lot more shadows than FSX ever could!

Make sure you have "Cast" ticked for "Simulation Objects" on the "Graphics" -> "Lighting" settings tab.

I also suggest ticking "Receive". In P3Dv4 shadows are finally casted onto AI aircraft.