BBC footage shows migrants scaling Calais fence
4 September 2014 Last updated at 15:06 BST
Migrants in Calais have been filmed scaling a 5m high (16ft) security fence to board lorries bound for Britain.
On Wednesday, scores of men tried to force their way on to a ferry bound for England, by running up the ramp. Amateur footage shows people running from police.
Mayor of Calais - Natacha Bouchart - has threatened to blockade the port unless Britain helped to control the migrants.
Duncan Crawford reports.