French authorities have detained a British trawler for fishing in their territorial waters without a licence, amid an ongoing tussle for post-Brexit fishing rights. The detention of the vessel came on the day that French authorities announced further retaliatory measures over Britain’s refusal to license more French trawlers to fish in its waters. French authorities say that they have stepped up surveillance of fishing vessels during negotiations on licensing, with French maritime gendarmes making multiple checks on fishing vessels off the northern French port of Le Havre overnight. According to the French maritime ministry two boats were fined on Oct. 27 after one failed to comply with police checks and the other was found to be without a proper licence. English fishing industry representatives accused the French government of politicising the dispute over licenses and ramping up the rhetoric ahead of the upcoming French presidential election. The vessel’s captain could …