The supplier of double deckers to the Lothian fleet reverted to Alexander Dennis in 2019, with the delivery of 78 Volvo B8L(T) Alexander Dennis Enviro400 XLB tri-axle double deckers. The newest double deckers in the fleet (as of summer 2021) are 42 Volvo B5TL Enviro 400MMC and 4 electric BYD D8UR-DD Enviro 400EV, delivered during 2021.
