A logo sits on a sign outside the entrance to the Alton Towers theme park, operated by Merlin Entertainments, in Staffordshire, central England on August 27, 2015. A total of 16 people required medical attention after the rollercoaster carriage they were in hit an empty carriage on The Smiler ride at Alton Towers, in central England, on June 2, 2015.    AFP PHOTO/PAUL ELLIS        (Photo credit should read PAUL ELLIS/AFP/Getty Images)