TfL's investigation was prompted by a string of expensive vehicles being registered as cabs in the past year, including sportscars such as Mercedes SLs, Porsche Cayennes and an Aston Martin DB7. Also put down for the scheme were
two £77,000 Maserati Quattroportes, 17 £117,500 Bentley Continentals and three Maybach 62s - which cost £300,000.