Monthly sales of the new TX4 taxi, launched by manufacturer LTI Vehicles last October, are expected to top 400 for the first time in March.
The widespread praise for the latest incarnation of the iconic London-style taxi, which retains the distinctive black cab shape, has led to a leap in demand from drivers wanting an 07-plated vehicle.
A third man has been arrested over the death of a taxi driver in Sheffield.
Father-of-five Younis Khan, 53, was shot as he drove along Scott Road, Pitsmoor, in the early hours of Wednesday.
South Yorkshire Police said the man, from Sheffield, who is in his mid-20s, was arrested on Thursday night.
Two other men, aged 23 and 27, who were arrested in Upperthorpe and Middlewood on Thursday morning have since been released on bail.
A post-mortem examination revealed Mr Khan died from a single gunshot to the chest, fired from a handgun.
Police have increased patrols in Pitsmoor.
