professional ferry pilots.
How do you define that?
A PPL like yourself would find it almost impossible to get insurance for the trip.
FWIW, I am not a PPL
when criticizing the decisions of a pilot
Criticizing when?
If I was going to criticise Mr Mellor's decisions (which I know nothing about) I would first get the historical forecasts and actuals for his route, and post them here. Then it could be discussed properly. I haven't done that, so... but neither has anybody else. (I have done that in some other accident cases which were discussed here).
So, over to
you, BPF. As you clearly are a "professional" pilot, your contribution to knowledge in this area would be enlightening (seriously). Let's see the weather for the route, and how would you plan it.