Britain's rich fishing waters are currently open to other member states with set quotas. Closing access would particularly hit France.
"There is no scenario in which French fishermen should be prevented, could be prevented, would be prevented by Boris Johnson, from fishing in British waters… So I will keep telling Britain that our fishermen must be allowed to keep fishing in its waters," French Agriculture minister Didier Guillaume told CNews on Wednesday.
Territorial disagreements between British and French fishermen have flared sporadically over the years, most recently in August 2018, when French vessels rammed British trawlers off the coast of Normandy in what became known as the ‘scallop wars’.
French President Emmanuel Macron will meet with Johnson in the coming days, once as he is officially installed as prime minister.
Right after Johnson’s election on Tuesday, Macron said that he wants to work "as quickly as possible" with the new Prime minister, not just on European issues but on Iran and international security”.