Halish Railway
Established Member
It does seem that when driven up to 90mph where possible, 158s do manage to make up quite a bit of time between Leeds and Skipton, although that is partly down to the amount of pathing/performance/engineering allowances.From this it seems that you wouldn't really save much time by skipping Cononley, unless the semifasts ran fast from Shipley to Skipton (not possible under the current timetable but theoretically doable). This would give departure from Skipton at xx51, saving a minimum of five minutes over the current timings.
Until a year or two ago there was an EMU worked Skipton to Leeds service calling at Keighley, Bingley and Shipley en-route, although it was pathed as a 75mph 15x. I did the service on a 322 which absolutely obliterated the timings, getting into Keighley about 3 minutes early. I'd imagine whatever replaces the 158s (probably a decade in the future) on the Morecambe and Carlisle services (Probably cascaded 195s or something new) will have similar performance characteristics to the 321/322s.