In 2015, National Express West Midlands took delivery of 106 Enviro400 MMCs, 58 of which were for its new high-specification Platinum range of services.
Stagecoach is currently in the process of receiving a total of 136 examples for services with Stagecoach London, Stagecoach Manchester, Stagecoach South East, Stagecoach East Scotland and Stagecoach in Oxfordshire as well as a single demonstrator vehicle whilst Cardiff Bus has received 10 examples.

In 2016, National Express West Midlands took delivery of a further 96 examples for its expanding Platinum range of services; they were launched on routes 126 (Now X7/8), 529, X1, X2, X3, X4, X5, X14 and X61 (now withdrawn, these buses went onto replacement routes X20, X21 and X22) .
In 2017, Southern Vectis took delivery of the MMC version to launch at the same time as its new ticket machines.
National Express West Midlands again purchased a further 38 examples for its Platinum range.
They were delivered throughout December 2017.
All 38 were intended for the Harborne corridor in Birmingham, originally routes 22, 23, 24 and 29.
In 2018, National Express West Midlands bought a further 72 Enviro400 MMCs for the West Midlands 9, 50, X10 and X70 and the Coventry 11 and 12X services.

Stagecoach East Midlands have placed 35 Enviro400 MMCs into service as of 2019.
The first three buses arrived at Worksop depot in August 2016.
The next batch of 15 buses entered service on newly-branded Simplibus services in Kingston upon Hull in October 2016.
Six more Enviro400 MMCs entered service on Lincolnshire County Council-funded InterConnect cross-county services based out of Gainsborough depot in November 2017, painted in a purple variation of the standard Stagecoach livery.
The final eleven buses entered service at Mansfield and Worksop depots in June 2018, branded for Nottingham to Chesterfield service the Pronto, operated jointly with Trentbarton.
A further 17 Enviro400 MMCs have entered service with Stagecoach Yorkshire, the first nine of which entered service at Barnsley depot in September 2016 for Town Lines service 66.
Eight more buses, delivered to luxury Stagecoach Gold specification for extended route X17 between Matlock, Chesterfield, Sheffield, Meadowhall and Barnsley, entered service in September 2018.

In October 2016, eight high-specification Enviro400 MMCs entered service at First West Yorkshire's Hunslet Park depot for First Express service X84 between Leeds and Skipton, branded as the Wharfedale Connection.
Arriva Yorkshire placed 37 Enviro400 MMCs into service across their Castleford and Heckmondwike depots during the summer of 2017.
Eleven of these were delivered to Arriva's luxury Sapphire standard for upgraded Castleford to Leeds services 163 and 166.
The remainder were delivered in standard Arriva specification for Leeds to Wakefield route 189 (based at Castleford) and Leeds to Dewsbury and Halifax routes 254 and 255 (based at Heckmondwike).
In 2015, National Express West Midlands took delivery of 106 Enviro400 MMCs, 58 of which were for its new high-specification Platinum range of services. Stagecoach is currently in the process of receiving a total of 136 examples for services with Stagecoach London, Stagecoach Manchester, Stagecoach South East, Stagecoach East Scotland and Stagecoach in Oxfordshire as well as a single demonstrator vehicle whilst Cardiff Bus has received 10 examples.
In 2016, National Express West Midlands took delivery of a further 96 examples for its expanding Platinum range of services; they were launched on routes 126 (Now X7/8), 529, X1, X2, X3, X4, X5, X14 and X61 (now withdrawn, these buses went onto replacement routes X20, X21 and X22) . In 2017, Southern Vectis took delivery of the MMC version to launch at the same time as its new ticket machines. National Express West Midlands again purchased a further 38 examples for its Platinum range. They were delivered throughout December 2017. All 38 were intended for the Harborne corridor in Birmingham, originally routes 22, 23, 24 and 29. In 2018, National Express West Midlands bought a further 72 Enviro400 MMCs for the West Midlands 9, 50, X10 and X70 and the Coventry 11 and 12X services.
Stagecoach East Midlands have placed 35 Enviro400 MMCs into service as of 2019. The first three buses arrived at Worksop depot in August 2016. The next batch of 15 buses entered service on newly-branded Simplibus services in Kingston upon Hull in October 2016. Six more Enviro400 MMCs entered service on Lincolnshire County Council-funded InterConnect cross-county services based out of Gainsborough depot in November 2017, painted in a purple variation of the standard Stagecoach livery. The final eleven buses entered service at Mansfield and Worksop depots in June 2018, branded for Nottingham to Chesterfield service the Pronto, operated jointly with Trentbarton. A further 17 Enviro400 MMCs have entered service with Stagecoach Yorkshire, the first nine of which entered service at Barnsley depot in September 2016 for Town Lines service 66. Eight more buses, delivered to luxury Stagecoach Gold specification for extended route X17 between Matlock, Chesterfield, Sheffield, Meadowhall and Barnsley, entered service in September 2018.
In October 2016, eight high-specification Enviro400 MMCs entered service at First West Yorkshire's Hunslet Park depot for First Express service X84 between Leeds and Skipton, branded as the Wharfedale Connection. Arriva Yorkshire placed 37 Enviro400 MMCs into service across their Castleford and Heckmondwike depots during the summer of 2017. Eleven of these were delivered to Arriva's luxury Sapphire standard for upgraded Castleford to Leeds services 163 and 166. The remainder were delivered in standard Arriva specification for Leeds to Wakefield route 189 (based at Castleford) and Leeds to Dewsbury and Halifax routes 254 and 255 (based at Heckmondwike).
Alexander Dennis Enviro400 MMC