There's now a version of the press release on the Network Rail site (the one linked in #53 is from Transport Scotland).
Work to lay foundations that will pave the way for the electrification of the Fife Circle is about to get underway.
www.networkrailmediacentre.co.uk
It includes a video.
In the "Downloads" column on the left of the press release is a map showing the first four stages of Fife electrification:
1, Haymarket to Dalmeny
2, from Thornton North southward to a point between Kirkcaldy and Kinghorn
3, from Thornton North westward to Lochgelly
4, from Thornton North northward to Ladybank
Not shown but already under construction is
5, the reopening of the Levenmouth branch, eastward from Thornton North, which will be wired from the start even though it will be run by DMUs at first (see its own thread).
These routes radiate from Thornton because there will be a feeder station there.
Edit: a bit of checking with railmiles shows that these phases will allow a battery train to get from Edinburgh to Dundee, Perth or Levenmouth, via Kirkcaldy or Dunfermline, without any continuous run of more than 20 miles away from the wires.