Not so. No common purpose and no evidence of equal shares being paid.
No night rating. No Instrument rating.
No common purpose. Not necessary if the flight was completely free (i.e. paid by the owner) .
No evidence of shared costs ; not relevant if it was a free flight.. In addition in my part of the word you have to prove things to accuse people , not because there is lack of evidence. And the UK , as far as I know is still a democratic country .
No night rating : yes and aggravating circumstances reinforcing the responsibility of the pilot
No IR : not relevant as the flight was filed VFR..
Do not find things to fit your suspicions. Nobody liked what happened and we all have serious suspicions , but t after 85 pages here , and unless new facts are brought in , for me the responsibility for this accident is still on the Pilot in command of that flight.
mainly because he did not say NO . He was not an employee , nor forced to do this flight and , and the aircraft was a private one.. If you want to prove it was a commercial flight in disguise then you have to brings facts on the table , a signed contract, a mission order , a money transfer to the pilot, etc.. in absence of any of this, it is just suspicions.