Ghengis said
"You can even do your bi-annual flight with an instructor within the PFA's coaching scheme."
To be sure you can but I believe you can also do it in a Permit aircraft outside the coaching scheme. IIRC the limitation is that the instructor is not allowed to be paid for the flight if it is a Permit a/c (and of course you have to be the owner or joint owner of the a/c)
Mike