The first ADL Enviro 400 MMC (Major Model Change) was built in 2014 with the first entering service in London during 2015. Since then the type has been available as an integral, the E40D diesel and hybrid E40H model. A number of Volvo B5LH models also entered service with London operators. The MMC became one of the standard London double-deck types, becoming popular with Go-Ahead London, Stagecoach London and Abellio London. The Enviro 400 City followed in 2018, the hybrid version proving less-popular than the Enviro 400 MMC. Arriva London and CT Plus took stock of the hybrid E40H model, with no others being purchased. However, the type came into its own when the body was fitted to the BYD D8UR DD electric double-decker in 2018. London's Enviro 400 MMC and City takes a look at the history of the two types since their introduction up until the present day. AUTHOR: David Beddall is a life-long bus enthusiast, who from the age of seven has pursued his interest in the subject. He initially took an interest in his local bus services in the Bedford area, but later expanded his interests to Northamptonshire and later still the whole of the country. London's Dart and Dart SLF is his latest book for Pen and Sword, in this volume he has researched the history of this iconic single-decker. David Beddall lives with his family in Northamptonshire, where he continues to pursue his bus interests. 180 colour illustrations