Total scam - NEVER use Viator. We bought tickets for "skip the line" locations in London - Tower of London and British Museum. Tower of London had a huge line and the ticket lady said that they had asked Viator to stop selling these tickets as there is NO skipping the line. British Museum - all museums in London are free so the only line is security - and no one can skip that line. Plus our guide at the British Museum was a contracted guide and she was terrible - could not hear her and she really could not understand our questions (not great English) - so we left the tour and proceeded on our own. We will NEVER book with Viator again!!