Dogs and fencing for Calais to help with migrant crisis

Extra sniffer dogs and fencing will be sent to Calais to help deal with the migrant crisis, the prime minister has announced.

Speaking after chairing a meeting of the Cobra emergency committee, David Cameron said the situation was "not acceptable".

It follows a fourth night of disruption at the Calais Eurotunnel terminal.

"This is going to be a difficult issue right across the summer," Mr Cameron warned.

Robert Hall reports.