- Amman Valley Railway H
- Bala Lake Railway H
- Borderlands Line
- Brecon Mountain Railway H
- Bridgend Valleys Railway H
- Butetown branch
- Cambrian Line
- Cardiff City Line
- Conwy Valley Line
- Corris Railway H
- Coryton line
- Denbigh & Mold Junction Railway H
- Ebbw Valley Line
- Fairbourne Railway H
- Ffestiniog Railway H
- Gloucester to Newport Line
- Gwili Railway H
- Heart of Wales Line
- Llanberis Lake Railway H
- Llanelli & Mynydd Mawr Railway H
- Llangollen Railway H
- Maesteg line
- Merthyr line
- Narrow Gauge Railway Museum H
- North Wales Coast Line
- Pontypool and Blaenavon Railway H
- Rhondda line
- Rhyl Miniature Railway H
- Rhymney line
- Shrewsbury to Chester Line
- Snowdon Mountain Railway H
- South Wales Main Line
- Swansea Vale Railway H
- Talyllyn Railway H
- Teifi Valley Railway H
- Vale of Glamorgan Line
- Vale of Glamorgan Railway H
- Vale of Rheidol Railway H
- Valley Lines
- Welsh Highland Railway H
- Welsh Marches Line
- Welshpool and Llanfair Light Railway H
- West Wales Line
H = Heritage Lines
