I would have thought that wires to Rochdale could be a decent option to pursue too. Perhaps in line with Bolton-Wigan and even to Wallgate and Southport one day - trains would need somewhere to go on the other side of course.
Eventually the whole Calder line should be wired, as it's hilly, with a decent mix of stopping patterns which wires would help, and relatively high frequency between two large cities. The issue is that services tend to run off in different directions from the trunk, which are non-electrified and lower frequency.
Eventually the whole Calder line should be wired, as it's hilly, with a decent mix of stopping patterns which wires would help, and relatively high frequency between two large cities. The issue is that services tend to run off in different directions from the trunk, which are non-electrified and lower frequency.