Lets not make up laws, we have enough as it is.
I'm not.
Here's the law....
Terrorism Act 2000 (c. 11)
and here's the wording .....
(2) Where a ship or aircraft is employed to carry passengers for reward on a journey to which this paragraph applies the owners or agents of the ship or aircraft shall not arrange for it to call at a port in Great Britain or Northern Ireland for the purpose of disembarking or embarking passengers unless—
(a) the port is a designated port, or
(b) an examining officer approves the arrangement.
(3) Where an aircraft is employed on a journey to which this paragraph applies otherwise than to carry passengers for reward, the captain of the aircraft shall not permit it to call at or leave a port in Great Britain or Northern Ireland unless—
(a) the port is a designated port, or
(b) he gives at least 12 hours' notice in writing to a constable for the police area in which the port is situated (or, where the port is in Northern Ireland, to a member of the Royal Ulster Constabulary).
It's perfectly clear. For a GA PPL your choices are either designated port or 12 hours notice, otherwise you are not authorised.
permitted = authorised = synonyms