uk waters has escalated further. the french prime minister has written to the european commission asking it to begin proceedings that could lead to retaliatory tariffs on uk goods entering the eu. the british government denies it is withholding licenses for french boats to fish in british waters. with the latest, here's our political correspondent alex forsyth. arriving in rome with a diplomatic row brewing, the prime minister stressed the ties that bind the uk and france. an old ally and friend, but the french president tonight told the financial times the uk's credibility is at stake in the row over fishing. this is the front line of this fight, which has been rumbling for months. the authorities here injersey and across the uk say they have stuck to agreements made after brexit and issued licences to french boats that can prove a history of fishing these waters. but france says dozens have been unfairly denied. localfishermen, like their counterparts across the channel, are frustrated and worried.