Zero Emission London Taxi Commercialisation

London’s iconic black taxis are being built with hydrogen fuel cells and batteries to run with zero tailpipe emissions. The programme tackled the engineering challenges needed to get commercial fleets of these hybrid taxis onto city streets. Each taxi combines a 30kW hydrogen fuel cell with a lithium polymer battery pack, giving it a 250-mile range and a refuelling time of just a few minutes—matching the demanding duty cycle of a London cab. Two prototype vehicles were built and approved for use on public roads. This matters because diesel and petrol taxis are a major source of urban air pollution, and battery-only electric taxis can struggle with range and long recharging times during a driver’s shift. If these fuel cell hybrids enter commercial fleets, they could cut emissions from one of London’s most visible transport icons without forcing drivers to change their working patterns. The same technology could also be applied to taxi fleets in other cities, helping to clean up urban transport systems that people rarely think about but rely on every day.