ADL, BYD and Optare to supply double-decker electric buses in London June 21, 2018 | Europe Company News UK-based Optare and a consortium of China-based BYD and UK-based Alexander Dennis Limited (ADL), have secured contracts from Transport for London (TfL) to supply a total of 68 double-decker electric b... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password