New colour footage has been released showing the widespread devastation caused by the German bombing attacks on London 70 years ago. One historian tells Channel 4 News how the attacks changed the face of the capital.
The amateur footage shows streets and buildings destroyed by the bombings, including the burnt out John Lewis store on Oxford Street.
Despite being reduced to a shell, the film shows signs which declare the store 'open for business'.
The film also features Prime Minister Sir Winston Churchill inspecting civil defence workers in Hyde Park....