London's new cab is a remodelled version of a vehicle first unveiled in August 2012. Modifications were made following feedback from the office of Boris Johnson.
The taxi was developed by Nissan's European design centre in Paddington and comes with round headlamps and a re-modelled grille as well as new front-bumper panels.
More top news
A man said to be armed with dangerous articles remains inside an address in west London.
British Bankers' Association head Anthony Browne warned that some banks could be moving abroad within weeks due to Brexit uncertainty.
Police have begun a murder investigation following the stabbing of a 28-year-old in Shepherd's Bush,west London.