TfW 231 231008Hengoed Hengoed

Class 231 are 4-car Stadler Flirt DMU's, 11 units were constructed between 2021-2022 by Stadler Bussnang AG. They are operated by Transport for Wales on Rhymney line since 2023. These units are similar to Greater Anglia class 755/4 Flirt's, except GA units have also pantograph installed on the roof of power pack, making them diesel+electric hybrids. Transport for Wales is also receiving 24 hybrid Flirt's, these will be class 756 tri-mode (electric+diesel+battery) units. Class 756 is expected to enter service later in 2024