The British Ports Association (BPA) has warned of potential disruption after the UK government appeared to drop its aspirations towards "frictionless" trade post-Brexit.

It was responding to leaked details of Thursday's declaration on the future relationship between the UK and the EU if the country leaves the bloc in March next year.

BPA chief executive Richard Ballantyne said the association had been supportive of UK prime minister Theresa May's so-called Chequers proposal as it committed to an agreement that ensured frictionless trade.