Network Rail are currently tendering for contractors to undertake design development work for two electrification schemes. The lucky lines concerned are Manchester to Rochdale and the CLC line (Manchester to Liverpool via Warrington). Public domain detailed here suggests early 2030 for...
www.railforums.co.uk
The latest information suggests that an all EMU service between Wigan and Stalybridge is indeed the ambition, once the electrification schemes have been completed (2024 ish).
To remind, the planned 'Option B+' for Dec 22 proposes:
1x Southport - Wigan - Bolton - Victoria - Stalybridge (bi-mode?)
1x Southport - Wigan - Bolton - Oxford Rd (bi-mode?)
2x Wigan - Atherton - Victoria - Calder Valley (DMU)
1x Victoria - Stalybridge (DMU)
Perhaps this switches to:
2x Wigan - Bolton - Victoria - Stalybridge (EMU)
2x Southport - Wigan - Atherton - Victoria - Calder Valley (DMU)
A much neater solution, but at the cost of another war with the Southport rail users.....
The December 22 timetable, as consulted by Northern, is actually:
1x Southport - Wigan - Bolton - Victoria - Stalybridge
1x Victoria - Stalybridge (interworked with the Southport)
1x Southport - Wigan - Bolton - Oxford Rd
1x Wigan - Atherton - Victoria - Brighouse - Leeds
1x Kirkby - Wigan - Atherton - Victoria - Todmorden - Blackburn
1x Wigan - Atherton - Victoria (peaks only).
The Southport services cannot all be 769s, as they total 9 diagrams, with the interworking at Stalybridge. Presumably 3 diagrams will be worked by 4-car 150s, with a daily turnout of 6 769s, as currently.
Post electrification, the Manchester Blueprint chart (download link
https://democracy.transportforthenorth.com/documents/s4262/Appendix 1 Manchester Blueprint for Services and Infrastructure.pdf) has a "service improvement opportunity" box labelled:
Electrification Options
2024 or 2025
Options to reconfigure the train service to enable full electric operation. e.g.Wigan to Stalybridge all EMU.
This strongly suggests that the Task Force is considering 2tph EMU Wigan NW - Bolton - Victoria - Stalybridge. So then the diesel Southport and Kirkby services would have to use the Atherton line and/or terminate at Wallgate.
To try to mollify OPSTA happy, I guess one option might be:
1tph Southport - Wigan - Atherton - Oxford Road
1tph Southport - Wigan - Atherton - Victoria - Brighouse - Leeds
1tph Kirkby - Wigan (- Atherton - Victoria peaks only)
1tph Victoria - Todmorden - Blackburn
Although with the December paths this would give uneven timings on the Atherton line.
Alternatively, it might be possible to go to 3tph all day on the Atherton line, if the proposed Victoria capacity improvements are completed in time. Enabling the Kirkby service to continue running through to Blackburn.
I think you could get around that by having a 1tph Southport-Wigan Wallgate-Golborne-Castlefield-? service to kill two birds with one stone by solving the problem of how to serve Golborne and givin
I think a Golborne service is more likely to be EMU from Wigan NW rather than DMU/769 from Southport. Not sure of the proposed timescale for the Golborne station?