Transport for Wales takes delivery of innovative electric hybrid tri-mode trains
Electric ‘tri-mode’ trains have been introduced to passenger services for the first time in the UK on the Valley Lines in South Wales, marking a significant moment in the development of the South Wales Metro.
The new trains are part of the Class 756 FLIRT (Fast Light Innovative Regional Train) fleet being supplied by Swiss manufacturer Stadler.
Tri-mode trains are able to operate in three modes, namely:
Electric Mode: Using overhead electric wires, which is the most energy-efficient and environmentally friendly option.
Battery Mode: Powered by onboard batteries, typically used in areas without electrification for shorter distances.
Diesel Mode: Using onboard diesel engines, enabling operation on non-electrified sections of the track.
While Transport for Wales (TfW) is electrifying its railway in pursuit of its decarbonisation goals, use the tri-mode trains enables it to bring in mostly electric power sooner across its varied railway infrastructure. The Stadler trains will replace TfW’s older rolling stock, with fourteen set to be in service by Spring next year.
James Price, TfW CEO said, “This is a huge moment for TfW and Wales, as we’re the first in the UK to be introducing this modern tri-mode train into passenger service.
“Our teams and delivery partners have been working on transforming our rail infrastructure in South Wales for the last three years and this signifies the next phase of the South Wales Metro.
“We’ve been modernising and electrifying the railway line and we are now extremely proud to be able to introduce the first of our brand-new trains.”
Emil Hansen, Commercial Project Manager for Stadler, added, “We are thrilled to see the UK’s first FLIRT tri-mode enter passenger service in Wales. Using battery technology, these transformative rail vehicles represent a significant leap forward in Transport for Wales’ efforts to drive decarbonisation and underscore Stadler’s trail-blazing technology and commitment to clean energy.”
The transformation of the Core Valley Lines for the Metro has been part-funded by the European Regional Development Fund through the Welsh Government and will enable faster, more frequent services between Cardiff and the heads of the valleys.
The work and new trains are part of TfL’s £800 million investment in the Wales and Borders Network. The electrification of the Merthyr, Aberdare and Treherbert lines has been essential in their introduction, alongside improvements made to station platforms to accommodate the new longer trains and deliver accessibility improvements.