Once all the main routes are done, and NR» have all the automatic equipment, they'll progressively upgrade other lines as time goes bike, just like other countries .. probably
Certainly once routes have modern signalling (which is immune to traction currents) and the main stations have been electrified, then the business case for further electrification becomes much better, particularly if there are electro-diesel units using the route anyway (for which electric traction will be cheaper and allow higher speeds and acceleration). Electrification is never going to be a particularly cheap exercise, but as NR and its contractors gain more experience, it should get faster to do, costs should come down and perhaps most importantly, the costs should be more predictable, which also improves the business case for projects as less contingency is required.
So, roughly speaking, we have the following schemes in progress:
- North West England
- Glasgow to Edinburgh
-
GWML▸ to Swansea, Bristol
TM‡, Newbury & Oxford
- GOBLIN
The following have not started but are a reasonable certainty:
-
MML» - Transpennine
- Welsh Valleys
- Hull
-
HS2▸ There have been a number of exercises to prioritise lines in the North of England but the following would seem like good candidates for CP7:
- Chester and North Wales
- Hope Valley
- Bristol to Birmingham
- Oxford to Birmingham
- Bristol to Exeter, Newbury to Taunton
- Possibly Basingstoke to Exeter
- Chiltern (dependent on the Underground's SSR resignalling
IIRC▸ )
That's a lot of route miles.
As for costs of new stock, yes
DMU▸ stock is very expensive, mainly because of the pollution control gubbins they have to have, but
EMU▸ stock isn't particularly expensive. The one exception to this was the first round of the
IEPs▸ , mainly because the
DfT» made such a hash of the procurement, but the suggestion has been that Hitachi are now pricing the units *very* competitively and getting a lot of business as a result.