Onlookers watched in disbelief as two lorry drivers pulled over on a busy motorway slip road and swapped trailers.

The drivers performed the dangerous manoeuvre on the M20 junction 9 slip road on the coast bound carriageway around 1.45pm today.

One witness, Andy Clark, said the two lorries pulled up, detached their trailers, pulled forward and swapped positions before REVERSING to the opposite trailers.

He said: "Both the slip road and part of the first lane were used to perform the manoeuvre.

"It was unbelievably dangerous. People wonder why there are so many tragedies on our roads.

"The police are often there dealing with lorries because that's where they park. The parking is a nightmare but this was just ridiculous."

The incident has been reported to the police.