Cargo shippers are diverting goods to more ports across Britain to ensure stable supply lines due to uncertainty over whether the UK will leave the European Union without an agreement, a top port executive said. Brexit has been delayed for a third time, until the end of January, and Britain is headed for a snap general election in December designed to break the impasse. The European Union’s Brexit negotiator Michel Barnier this week said there was still a risk that Britain could exit the bloc chaotically with no divorce agreement.