Wrightbus to supply 20 hydrogen buses in London by 2020 May 13, 2019 | Europe News Wrightbus has secured a contract from Transport for London (TfL) to supply 20 hydrogen double-decker buses. Ballard will supply 20 FCveloCity-HD 85-kW fuel cell modules to Wrightbus for the hydrogen b... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password