"The trade deal is clear but I think there has been some confusion about how it needs to be implemented, because we absolutely respect the historic rights of French fishermen to fish in Jersey waters as they have been doing for centuries", he said.
"Regarding Jersey, I remind you of the delivery of electricity along underwater cables ..."
Jersey External Affairs Minister Ian Gorst told BBC Radio on Wednesday: "It would seem disproportionate to cut off electricity for the sake of needing to provide extra details so that we can refine the licences".
On Thursday morning, around 100 French fishing vessels will sail to Jersey port to protest over the issuing of the licences, the head of fisheries for the Normandy region, Dimitri Rogoff, told AFP.More news: Canada halts distribution of J&J vaccine
Britain's government said earlier Wednesday that the French threat was "clearly unacceptable and disproportionate" and that it was working with the European Union and Jersey over the fishing matter following the end of the Brexit transition period.
The Prime Minister reiterated his unequivocal support for Jersey and confirmed that the two Royal Navy Offshore Patrol Vessels would remain in place to monitor the situation as a precautionary measure.
French Maritime Minister Annick Girardin meanwhile accused Jersey, the largest Channel Island, of dragging its feet over the issuing of licences to French vessels under the terms of Britain's post-Brexit trade deal with Brussels.
French fishermen are threatening to blockade the port of Saint Helier, the capital of Jersey, Channel Islands.
The fishermen did not stop local fishing vessels from operating nor block access to the port, according to the Normandy regional fishing committee, which helped organize the protest.More news: At least 15 killed after train bridge collapses in Mexico
Mr Gorst, however, said the island was not seeking to bar boats which had historically fished in Jersey waters and insisted the dispute could be resolved amicably.
"We have means at our disposal".
The French fisheries ministry said Britain had introduced "new technical measures" relating to licences for fishing off the Channel Islands which had not been properly declared to the European Union under the terms of the Brexit deal. The UK government is constitutionally responsible for the worldwide relations of the crown dependencies. "Even if it would be regrettable if we had to do it, we'll do it if we have to", Girardin told France's National Assembly on Tuesday, per Reuters. "Jersey has consistently shown its commitment to finding a smooth transition to the new regime", Horst said in a statement. "He wants everyone to leave", he said.
"There are a number of important matters which we will continue to work through", he said.
"Boris sends gunboats into Jersey", read a Daily Mail headline, while The Daily Telegraph said Johnson had sent the navy to the island to "face the French".More news: Women Make History As Nancy Pelosi, Kamala Harris Flank Biden For Speech
French government spokesman Gabriel Attal declined to comment on the electricity issue on Wednesday, but he expressed France's "total determination" to fully implement the post-Brexit agreement with the United Kingdom, especially regarding the fishing industry.