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.
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"Big Sam" was spotted letting his hair down in the seaside resort weeks after securing Premier League survival for Sunderland.
Greater Manchester Police visited a property twice on Saturday - finding a body on the second occasion.
163,000 French and 143,000 German soldiers were killed in the 10-month battle in 1916.