Can YOU solve the 'hardest puzzle in the world'? 30,000 people have submitted entries to British intelligence service's Christmas teaser with NO correct answers

http://www.dailymail.co.uk/sciencetech/article-3421294/Is-hardest-puzzle-world-30-000-people-submitted-entries-GCHQ-s-Christmas-teaser-no-correct-answers-three-days-solve-it.html