'Nothing to stop migrants entering lorries at Calais'

Hundreds of migrants in Calais who are attempting to enter the UK illegally have been jumping on lorries again on Wednesday.

Border security is being stepped up in northern France and Dover after migrants desperate to reach the UK tried to exploit ferry strike action.

On Tuesday, the port of Calais and the Channel Tunnel were closed for most of the day.

Ed Thomas reports from Calais.