Transport for London has ordered 20 hydrogen-powered double-deckers for delivery next year, they will be manufactured at Wrightbus in N Ireland and are presumably based on that manufacturer's Streetdeck design. The buses will be operated by Metroline on routes 7/N7 (Oxford Circus-East Acton/Northolt) and 245 (Golders Green-Alperton); a hydrogen refuelling facility will be installed at Metroline's Perivale Garage. https://tfl-newsroom.prgloo.com/new...decker-buses-to-help-tackle-londons-toxic-air Metroline seems to be at the forefront of alternative fuel technology double-deckers. It already has 5 experimental BYD electric double deckers in service on route 98 (Willesden-Holborn) from Willesden Garage. During the Summer the company will take delivery of 68 electric double-deckers; 31 Optare Metrodeckers for route 134 (North Finchley-Warren Street) from Potters Bar Garage and 37 BYD/ADL E400 City for route 43 (Friern Barnet-London Bridge) from Holloway Garage.