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People fill the Eurostar terminal at St Pancras station in London on June 23, 2015 after disruption on the French side of the Channel Tunnel caused all services to be cancelled. Hundreds of protesting French sailors on June 23, 2015 forced the suspension of Eurotunnel services between France and Britain in both directions after torching tyres on the tracks, causing traffic and travel chaos. AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)

People fill the Eurostar terminal at St Pancras station in London on June 23, 2015 after disruption on the French side of the Channel Tunnel caused all services to be cancelled. Hundreds of protesting French sailors on June 23, 2015 forced the suspension of Eurotunnel services between France and Britain in both directions after torching tyres on the tracks, causing traffic and travel chaos.  AFP PHOTO / BEN STANSALL        (Photo credit should read BEN STANSALL/AFP/Getty Images)