it may look like any other London taxi, but this is actually an all-new electric model.
The TX has been developed in the UK by the newly-rebranded London Electric Vehicle Company (LEVC), with substantial investment from its Chinese owners.
The firm claims the new cab has a pure electric range of around 70 miles. With the assistance of a 1.5 litre petrol range extender, it can go for up to 400 miles.
Similar technology has been used in passenger cars like the BMW i3 for a few years but this is the first time it has been used in a purpose-built taxi.
The model is due to hit the streets in October, in time for a clamp-down on polluting taxis by Transport for London.
Only "zero emissions capable vehicles" will be licensed from January, effectively banning new diesel cabs from the capital.
Richard Gordon, commercial director at LEVC said: "The vehicle has really been designed around a London cabbie's use. Many will be able to charge the vehicle overnight.
"They'll tend to run into town on the range extender and then have full use of the electric motor while working within central London."
TfL will offer grants of up to £5,000 to encourage drivers of the most polluting diesel taxis to upgrade.
:: Rapid charging
Some drivers are concerned that there are not enough rapid chargers to meet demand.
An average cab driver covers around 120 miles per day, according to LEVC, meaning four in five will need to recharge mid shift.
With 24,000 cabs on the streets of Greater London, there will be a big demand for rapid chargers, by the time all of them go electric.
Transport authorities say there will be 300 rapid 50kw chargers on the roadsides of London by 2020, with 75 due to be fitted by the end of the year. That is in addition to slower, standard charging units.