Lorry drivers and farmers stage protest against the French government's failure to close the camp, known as the 'Jungle'.
Passengers at Dover and Calais were left stranded for hours after protest on eve of visit to French port by French prime minister.
Protesters used lifeboats to stop ships entering or leaving the French port on one of busiest nights of the year.
Protest aimed at getting prisoner, whose father was among those killed in Roma camp earlier this week, released for funeral.
Up to 600 workers at MyFerryLink risk losing their jobs on July 2 following decision by Eurotunnel to end its partnership with the company.