A seagull flies above the English channel with the white cliffs of Dover, the closest British coastline to mainland Europe, seen behind, near Dover in Britain, March 27, 2017. REUTERS/Toby Melville TPX IMAGES OF THE DAY 

A couple walk their dog along the beach at Durdle Door with the English Channel sea connecting Britain to mainland Europe seen behind, in south west England, May 13, 2016. REUTERS/Toby Melville 

'Little Ships' end their journey across the English Channel as they enter Dunkirk harbour in northern France, May 21, 2015. Over fifty 'Little Ships', used in action in 1940, sailed from Ramsgate harbour in south east England to mark the seventy fifth anniversary of Operation Dynamo in World War II when a mass evacuation took place of Allied troops as German forces advanced through France. REUTERS/Pascal Rossignol

Trawlers slow down shipping traffic during a protest in the Channel, northern France May 23, 2008. Hundreds of French fishermen blocking ports and oil depots in France in protest at diesel fuel costs and fishing quota they say are killing their businesses. REUTERS/Pascal Rossignol (FRANCE) 

People stand near the ancient windmills in the village of Campo de Criptana at the Castilla-La Mancha region in central Spain April 16, 2006. La Mancha windmills [are part of the Miguel de Cervante's "Don Quixote", Spain's most famous literary character.]