ZA wrote
Several pilots compete on NPPLs.
Why ever not?
One possible reason might be that as some PPLs who lose their Class 2 medicals revert to the 'lesser' NPPL medical signed off by their GP, the stresses both physical and mental of aerobatic competition might just be too much for the Class 2 failed medical heart condition for example.
I'm still not sure that all GPs are aware of the difference between Aerobatic flying and trundling a HGV around the M25.
And there are likely to be a concentration of spectators not far from the aerobatic box.
Just a theory
Cusco