I thought it might be helpful to post a status summary of both past project milestones and those that are currently promised. if you have any corrections or additional information please let me know!
I'm going to use the
January 2024 consultation as the baseline:
Late January consultation: installation of new points on the Bay line at Queen St and subsequent speed limit change (
completed - now in use)
September 2024 consultation
Rolling stock introductions
Class 398s:
Back in
October 2023 the earliest entry-into-service date for the 398s was proposed as 1st November 2024.
The most recent update is that they will enter service in "Summer 2025" on the Pontypridd-Cardiff Bay line initially, and they are supposed to replace the 756s on Treherbert, Aberdare and Merthyr lines from "late 2025".
4-car 756s on Merthyr/Aberdare/Treherbert services
Promised: 4 x units/day in service from the end of December 2024, rising to 14/day by the spring (there are 17 of these units in total). As of January 18th there have been 4 units/day in service on some days but definitely not every day. Treherbert only gets a couple of 756 services in the early morning and evening at present.
3-car 756s on Coryton/Caerphilly/Penarth services
Promised (TfW website): "new trains on the Coryton line from Spring 2025". "Spring" is a bit vague but the timetable change date in mid-May seems a likely target.
4-car 756s on Rhymney services
These need to wait for the electrification to go live, and "late 2025" is the timescale currently being put out in
TfW press statements as the start of some 756 services to Rhymney. It's likely that the full transition won't be complete until mid-2026.