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.
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Officers believe the three assaults are linked and are appealing for information about the suspect.
Nine addresses in Lewisham were searched and 13 arrests made early on Tuesday morning in a planned, intelligence-led operation.
The Purple Rain singer died in April 2016