Boris Johnson appears to be backing London's cabbies in a row with his transport chiefs over controversial 'taxi apps'.
The mayor believes the smartphones used minicab firm Uber are 'effectively a meter'. If the mayor is right, Uber drivers could be breaking the law.
But Johnson's verdict contradicts the view held by bosses at Transport for London who granted Uber a Private Hire licence.
The decision infuriated the black cab trade and led to a series of protests where cabbies blockaded parts of central London
TfL wants the High Court to give a ruling but the case has been delayed by a decision by the cabbies' union, the LTDA, to launch a private prosecution against four Uber drivers.