tbtc
Veteran Member
Are there any local services which can switch to EMUs as a direct result of MML electrification without any add-on bits or splitting up services?
It depends on what is wired.
If its "just" the route served by the typical off peak EMT services from St Pancras (to Corby, Nottingham and Sheffield) then the answer is that no local services will be replaced by EMUs apart from the London ones. Not unless you start chopping routes (like the Leicester - Lincoln service), but that's another story.
If the line is wired as far as Moorthorpe/ Doncaster (to allow the current EMT services to/from Neville Hill/ Leeds to continue) then the hourly Sheffield - Moorthorpe - Leeds service could be an EMU (three diagrams). The hourly Sheffield - Doncaster - Adwick service could move to EMU operation, but this comes from Lincoln so you'd need to rejig the timetable. There's potential to run more EMUs between Sheffield and Doncaster if you are prepared to chop other DMU services, of course.
The "biggie" would be if the line from Meadowhall to Leeds through Barnsley was wired. That would free up the (eight diagram?) Nottingham - Sheffield - Leeds service plus the (three diagram) Sheffield - Castleford - Leeds service.
Other short infills would include Ambergate - Matlock (for the hourly Nottingham - Matlock service). Really though it depends on whether you are talking about just the basic "MML" or the whole line to Leeds (in the way that the benefits of TPE electrification vary depending on whether you are wiring just the core or the branches to Hull etc)