The report said a map of toilets should be made available online, via the London Travel Information Line, Visit London and TfL websites and in print.

BBC: Call for London 2012 toilet map

"What this means is that if you have a cement factory in three or four countries, you may have to travel from country A to country B via Paris, London or Dubai rather than direct, " says Peaford, editor-in-chief of Arabian Aerospace magazine and online news service.

CNN: Private jets spread their wings in Africa