Bertram 's Hotel is popularly believed to have been inspired by Brown 's Hotel , in London , where Agatha Christie often stayed when visiting London . However , the '' Oxford Dictionary of National Biography '' claims that Christie 's model was a different Mayfair hotel , Flemings Mayfair . The Great Train Robbery ( 1963 ) was a background influence
Great Train Robbery ( 1963 )
Great Train Robbery (1963)
At Bertram's Hotel