Arriva withdrew from the tender procedure between 2018 and 2033: In October 2017, Arriva withdrew from the tender procedure, followed by Abellio in February 2018, after the collapse of its partner Carillion.     In May 2018, the franchise was awarded to KeolisAmey Wales. It started on October 14, 2018 and has a duration of 15 years.  In 2018, the government authority Transport for Wales (commercially separate from the railway operating company) awarded KeolisAmey the Wales and Borders franchise, which began operating on October 14, 2018.  KeolisAmey uses the brands Transport for Wales and TfW Rail (in Welsh: Trafnidiaeth Cymru and TrC Trenau), , owned by the Welsh Government, for day-to-day operation. The Welsh Government will franchise on 7 February 2021, keolisAmey will continue to play a minor role in the franchise and transfer the operation to a Welsh government operator.  A total of 77 diesel trains from the 197 Civity range have been ordered from CAF for long-distance transport. These trains will have terminus corridors, but fewer toilets than the Class 158 and Class 175 trains that replace them.  However, they will be faster, with more powerful motors and more efficient gears for better acceleration and higher maximum speed than in the 158 years.
Among the types of trains previously operated by Transport for Wales Rail Services, these units should be withdrawn and replaced before 1 January 2020, but they can continue to be put into service until 31 December 2020 (extended from 31 July 2020), to the derogation of the law. The three Marks 4-Sets and five Class 230s are also retained and will remain on the lines they will serve from the date of their introduction into TfW Rail traffic. The entire temporary fleet inherited from ATW and additional from TfW Rail is expected to be replaced by 2023 (with the exception of the 67 series locomotives).  In October 2016, four offers were pre-selected for the upcoming Wales & Borders franchise: Abellio, incumbent Arriva, a joint venture of Keolis/Amey, and MTR Corporation.   On 29 September 2020, 142082 was the first TfW Rail 142 Series PACER DMUs (inherited from ATW) to be permanently retired from operation. . . .