My apologies confused it with the East Coast mainline.
The problem is old trains for what maybe 5 years? And how much of the fleet is being replaced? Im sure I read 170's could remain on the Fife route?
My take on the article was push and pull maybe on Dunblane or some semi fast routes. More class 158 two carriages since there's 4 less 170's? Plus no new trains to cover the borders line?
Relax.
The loss of a few 170s in the short term is inconvenient but it's a relatively small number of carriages and the extra loco hauled train (almost certainly on the Fife Circle not Dunblane) should make up some of the difference.
Overall the new franchise has a lot more carriages than now, but the extra capacity won't be available until the extra trains arrive from 2016 onwards.
Here's an approximate timeline. My guesses have a ? after them.
April 2015
4 x 3 car 170s to Thameslink
Second (6car?) loco hauled train on Fife Circle.
September 2015
5 x 2 car 158s needed for Borders Rail
December 2015
7 x 4 car 321s arrive from England (London Midland?) to lengthen busy Glasgow suburban services.
December 2016
Edinburgh - Glasgow via Falkirk electrified. First Hitachi AT200s arrive replacing 170s.
Refurbished 158s on West Highland Line?
December 2017
Full service of E-G using 24 x 4 car new electric Hitachi AT200s.
5 x 3 car 170s subleased from Thameslink leave?
Loco hauled trains released?
December 2018
Entry into service of most of the 46 x 3 car new electric Hitachi AT200s.
Used on:
Edinburgh - Dunblane
Glasgow - Dunblane
Glasgow - Alloa
Glasgow - Falkirk Grahamston via Cumbernauld
Cascade on existing electrified lines to release 314s.
Entry into service of refurbished HSTs. 13x 2+5 and 14x 2+4.
Used on:
Glasgow - Aberdeen
Glasgow - Inverness
Edinburgh - Aberdeen
Edinburgh - Inverness
Aberdeen - Inverness
Scotrail release remaining 50 x 3 car class 170s?
Scotrail release (scrap) 16 x 3 car class 314s?
December 2019
Edinburgh - Glasgow via Shotts electrified and uses remaining 3 car AT200 trains.
December 2020
Glasgow - East Kilbride, Glasgow - Anniesland via Maryhill electrified?
If Abellio receives extension from 7 to 10 years an additional 10 x 3 car AT200s ordered from Hitachi.
16 x 2 car 156s released?
8 x 2 car 156s released?
Additional Scotrail trains by carriage numbers:
28 Class 321s
234 AT200s
121 HSTs
30 extra AT200s if franchise extended
Total 413 extra coaches
Released Scotrail trains by carriage numbers:
177 Class 170s
32 Class 156s
16 Class 158s
48 Class 314s
6 Loco Hauled Mark 2s
Total 279 carriages released
Temporary Scotrail train during first years of franchise
6 Loco Hauled Mark 2s
Net increase in carriages 413 - 279 = 134 extra carriages by 2020.