So, the question seems to be; is it legal to log a flight that was illegally flown?
Aircraft insurance did not use to be mandatory (although many airfields required that aircraft
using them did hold a certain level of cover).
I believe all aircraft (at least in the UK) are now required to hold a minimum level of insurance.
Is a flight in an uninsured aircraft actually illegal, or just a very bad idea?
Anyone able to provide CAA / EASA chapter and verse on this?
Irrespective of the insurance issue was the RH seat pilot ever actually PIC in the scenario given?
Sounds a lot like someone going up with a friend in their own aircraft, or one hired from a club
by LH seat pilot. With RH seat pilot just "having a go".
When, and how, did LH seat pilot give up being PIC?