Exclusive: Migrant smugglers are becoming more "professional and innovative" and are putting an increasing strain on Britain's ability to protect its borders, the head of Europol has said.

Rob Wainwright, the head of Europol, told The Telegraph that the migration crisis has presented a "huge new criminal opportunity" as gangs are finding new routes into Britain after the Government bolstered security at Calais.

He admitted that Britain cannot "control 100% of your border 100% of the time" and also disclosed that British gangs are involved in people smuggling operations in France.