Arriva Trains Wales was a train operating company in Wales, providing passenger rail services from 2003 until 2018. It was part of the Arriva Group, which is a subsidiary of the Deutsche Bahn group. The company operated a network of routes connecting major cities and towns across Wales and into England. In 2018, Arriva Trains Wales was replaced by Transport for Wales, which took over the rail services in the region. The transition aimed to improve service quality and expand the rail network, enhancing connectivity for passengers throughout Wales and beyond.