The UK is prepared to take legal action against France over the ongoing row about post-Brexit fishing rights, Foreign Secretary Liz Truss has said, according to BBC News. Last month, the UK and Jersey denied permits to dozens of French boats to operate in their waters. In retaliation, France threatened to block British boats from some of its ports and cut electricity to Jersey. Truss told the BBC that France was acting "unfairly" in setting a deadline for issuing more fishing permits. Officials in Paris say that, unless this happens by Tuesday, they will take action. France"s minister for Europe, Clément Beaune, accused the UK of making a "political choice" by barring "more than 40%" of French boats from UK and Channel Island waters. But Truss told BBC Radio 4"s Today programme that fishing licences had been awarded to French boats "entirely in accordance" with the post-Brexit deal between the EU and UK. She warned that unless France withdrew its threats, the UK was prepared to "use the dispute resolution mechanism in the trade deal we signed with the EU to take action against the French". On Sunday, Boris Johnson and French President Emmanuel Macron met for 30 minutes during the G20 summit but failed to resolved the problem. The UK government said it was "up to France" to draw back from its threats, while Mr Macron insisted the ball was "in Britain"s court". UK-French tensions were further inflamed on Friday, when a letter emerged from French Prime Minister Jean Castex to European Commission President Ursula von der Leyen suggesting the fishing dispute was an opportunity to show that EU countries risked more damage from leaving the bloc than staying in. Johnson said he was "puzzled to read a letter from the French prime minister explicitly asking for Britain to be punished for leaving the EU". Although fishing is a small part of both the British and French economies, it has been a highly sensitive political issue throughout Brexit. The latest row began after a British trawler was seized by France and another fined during checks off Le Havre on Thursday.