A “Yes” campaign poster is displayed on the Isle of Lewis in the Outer Hebrides

A “Yes” campaign poster is displayed on the Isle of Lewis in the Outer Hebrides

A “Yes” campaign poster is displayed on the Isle of Lewis in the Outer Hebrides September 13, 2014. The referendum on Scottish independence will take place on September 18, when Scotland will vote whether or not to end the 307-year-old union with the rest of the United Kingdom. REUTERS/Cathal McNaughton (BRITAIN – Tags: POLITICS ELECTIONS TPX IMAGES OF THE DAY)