Is there a definitive plan for electrification towards Fife or is it a case of there’s some resource available so let’s “fill a gap”? Given an updated decarbonisation plan is still awaited (presumably linked to the Scottish government budget) it gives the impression of being haphazard?
I'm sorry, I have no idea, a mast appears every now and again and thats it really. No substations or anything that ive seen yet.
Google maps suggests there are four overbridges still there that might need work. Ultimately though it's likely that any future blockade of Winchburgh tunnel would result in cancellations between Linlithgow and Edinburgh Parkway, as the capacity to divert a minimum of 4tph in each way with a reversal at Dalmeny seems unlikely.
2 bridges before the South Gyle station need rebuilt and theres 2 immediately before the Airport that need done as well. Theres also one on the curving approach to Dalmeny jn that needs attention too. I make it 5 in total
Theres absolutely no chance of 4tph being diverted via Dalmeny. If I remember correctly, when Winchburgh tunnel closed for few weeks to slab and lower the track and sort out the flooding issue the E and Gs were reduced to half hourly but ran as 6 car turbos all day. The Dunblane to Edinburgh services started and terminated at Linlithgow with connections to/from Edinburgh on the E and G services. If my memory isn't playing tricks on me I'm sure thats what happened.
There's a stated intention, though the plan is subject to revision.
Most likely it will be revised. I'll bet there will still be diesel trains in passenger service around in the central belt after 2035.