The Mercedes-Benz Vito taxi is back at Millbrook at the end of the month for further Euro 6 retrofitting testing as trade eyes up August/September approval date.

The black cab is set to return to the testing centre on 31 May before running for 10,000 miles during a 24/7 timescale to accelerate approval into the London market.

TX4 taxi owners have also been waiting patiently for the kit to become available in London, after seeing the retrofit approved in other major UK cities including Birmingham and Glasgow. According to retrofitting experts HJS, the TX4 is running approximately one month behind the Mercedes-Benz Vito.