helihub
I would avoid "cost sharing arrangements" unless you know the helicopter owner or pilot very well - any problems and a court would soon find that you did not know them prior and were intentionally circumventing the system. It's like evading tax - avoiding is OK if you know the owner or pilot, evading is not.
The legal requirements for cost sharing are fully set out (in the usual CAA gobbledygook) in the ANO.
Where is the requirement that the pilot and passenger(s) should know each other very well? Or at all?
H.