Cardiff Canton TMD is a diesel locomotive traction maintenance depot in Cardiff, Wales. Its depot code is CF. It is operated by Transport for Wales. The depot is used by Transport for Wales fleet and some Cross Country Class 170s.

Arriva Trains Wales was a British train operating company owned by Arriva UK Trains that operated the Wales & Borders franchise. It ran urban and inter-urban passenger services to all railway stations in Wales, including Cardiff Central, Cardiff Queen Street, Newport, Swansea, Wrexham General and Holyhead, as well as to certain stations in England such as Hereford, Shrewsbury, Chester, Crewe, Manchester Piccadilly and Birmingham New Street.