Since the introduction of the first bus to the RV1 running between Covent Garden and Tower Gateway Station in 2011, further vehicles have since been built and tested and introduced.
During the summer of 2013 the final bus will arrive making this the first route to be fully operated by hydrogen vehicles.
This is part of our bid to reduce CO2 emissions from transport and tackle climate change.
Mayor Boris Johnson has set tough targets to cut CO2 emissions by 2025.
Hydrogen powered vehicles offer a significant step towards achieving this goal.
Each of the vehicles has been rigorously tested during its operation and the reliability has improved massively since London first took part in the Cleaner Urban Transport for Europe (CUTE) trial of hydrogen buses between 2007 and 2009.
London is now part of CHIC, the Clean Hydrogen In European Cities Project, which is the essential next step leading to the full market commercialization of Fuel Cell Hydrogen powered (FCH) buses.