Don't read that opinion into my post Creampuff - I didn't intend it that way.
The Pelair manuals were deficient in flight planning methods, and so was their training (not on their Pat Malone there, though) - and the CAA allowed that - especially with the complications of not being RVSM, and not being trained on the recently fitted TCAS, to allow the full range of diversion options.
The met department admit that they cannot predict the weather at Norfolk - but don't append their TAFs with "PROB 10 FG".
The question of whether the flight was AIRWORK, with an illegal passenger, or CHARTER and lacking the diversion options that requires is yet to be addressed.
etc. etc.