Launched by Transbus in 2004, the original Enviro 200 mode was not a success. The Enviro 200 was relaunched in 2006, this new model becoming more successful. The new model was taken into stock by many London operators, replacing older single-deckers in their fleets. The Enviro 200 had just as much success as its predecessor, the Dennis Dart SLF. As with the Dart SLF, the Enviro 200 was available in a number of lengths. 2014 saw the launch of the Enviro 200 MMC (major model change), this replacing the original 'classic' Enviro 200 in 2018. The first all-electric Enviro 200 MMCs arrived in London in 2016, this becoming the standard model for new contracts. The London Enviro 200 looks at the history of the Enviro 200 and Enviro 200 MMC model in London service.