The British and French standoff on the seas round Jersey is, at first glance, a row over logbooks, lobsters, licences and sea snails. But it is the result of a perfect storm of British, French and European politics and, inevitably, Brexit. The technicalities of fishing licences in the 12 miles around Jersey’s coasts are vitally important for French fishermen. They blockaded Jersey’s main port, after accusing the Channel Island government of not granting enough licences and imposing unfair conditions on them. But such disputes rarely lead to Royal Navy and French navy ships eyeing each other across the waves unless it suits politicians on both sides. So how did it come to this? The UK-EU Trade and Cooperation Agreement (TCA), which came into force on December 31 last year, sets out the new post-Brexit fishing rules. Under the deal struck on Christmas Eve, EU boats can continue to operate in UK territorial waters if they can prove historical fishing activity in the area. Access is granted by the issuing of fishing licences but France is angry about how the new rules are being implemented and has accused Britain of dragging its feet.