A salmon n sea trout licence is only needed the ocean is everymans as it sais in the magna Carta id also like to add "this is God's land"
Hmmmm, but you said ' tidal estuary'
and Magna Carta only gave the barons the right to habeas corpus and to be consulted on taxation.
Nowt to do with ordinary folks fishing rights....of which they had none because those 'rights' have always been worth money and thus someone higher up the food chain claimed them.
Magna Carta, "It promised the protection of church rights, protection from illegal imprisonment, access to swift justice, and, most importantly, limitations on taxation and other feudal payments to the Crown, with certain forms of feudal taxation requiring baronial consent."