The National Express West Midlands service is usually operated by Alexander Dennis Enviro 400s, and going into service now Brand New ADL 400 MMC's many of which are branded specifically for the 50, although Dennis Trident 2/Alexander ALX400s also appear occasionally.
The National Express West Midlands service is usually operated by Alexander Dennis Enviro 400s, however during April they will be joined by the new Alexander Dennis Enviro400 MMCs. Most of the buses are branded specifically for the 50, although Dennis Trident 2/Alexander ALX400s also appear occasionally.