Replacement for London's black cabs

Apparently these are selling like hotcakes in the UK:


The image and following excerpt are from Easier Motoring:

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.

I can't imagine driving such a car. I'm used to the large, powerful Crown Vic.