This reminds me of the FAA's culpability towards the MAX. The comparison to me is "peanuts for monkeys", insufficient funding for authorities such as the FAA and CAA means they don't check well enough. It s balancing the cost versus the risk and sometimes things go wrong but in aviation often at a human cost.
I would love to see the owner, operator, pilot and "fixer" of the charter brought to court. Even at the risk of not being convicted, I would hope such a public shaming would help reduce this outrage. I mean come on! A pilot flying illegally in multiple ways in a sub standard plane!? And then as a way of moving forward the AAIB suggesting the client checks the operators and pilots license!? The client will never be able to do this, he has to be able to rely on his "fixer".
The pilot and planes licensing web is so complex that on this thread alone there were multiple debates about a UK license with a piggy back FAA license, with restrictions etc and what would be the correct interpretation. The client will never be able to do this, he has to be able to rely on the fixer. That fixer needs bringing to court along the others. The public deserves protection. The lack of outrage worries me.
My two cents.