Aid organisations said migrants camped in Calais had made last-ditch attempts to cross the Channel ahead of today's operation.
Border police were said to have spotted groups of up to 40 people hiding in bushes along roads leading to the port.
Some were attempting to jump on lorries as they slowed down.
More top news
Peter Martinez's remains were discovered in a five-gallon bucket filled with cement up to his shins.
Warmer - even without wall to wall blue skies