Dame Angela Eagle, minister for border security and asylum, said lives had been lost because “ruthless criminals running the small boat trade are overloading people into unseaworthy vessels”.
She said the government was “committed to smashing these gangs” and was supporting the French authorities.
“It never stops,” the mayor of Sangatte Guy Allemand told AFP. “It’s crossing after crossing, without any let-up.”
He said seven people had needed intensive care after the incident.