I think it would work, quick link to St Pancras International
I think the way i would chose would be
LONDON ST PANCRAS - LEICESTER - DERBY- CHESTERFIELD - SHEFFFIELD - BARNSLEY - WAKEFIELD KIRKGATE - WOODLESFORD - SHIPLEY - SKIPTON - HELLIFIELD - SETTLE - APPLEBY - CARLISE - DUMFRIES - NEW CUMNOCK - KILMARNOCK - BARRHEAD - CROSSMYLOOF - GLASGOW CENTRAL
(Double the branch between Mauchline junction & Barrhead)
Or another idea that you could use is
LONDON ST PANCRAS - LEICESTER - EAST MIDLANDS PARKWAY - THROUGH TOTON OR BEESTON - LANGLEY MILL - CHESTERFIELD - GRINDLEFORD - NEW MILLS CENTRAL - STOCKPORT - MANCHESTER PICCADULLY P13 & 14 - DEANSGATE - SALFORD CRESCENT - MOSES GATE - BOLTON - BLACKBURN - CLITHEROE - HELLIFIELD - SETTLE - APPLEBY - CARLISE - CARSTAIRS - SHIELDMUIR - UDDINGSTON - CAMBUSLANG - GLASGOW CENTRAL
Honstly there loads of ways you can do it from London To Scotland, the above is only the Path i think it could take not stopping at!
And i don't think Bolton and Blackburn have an direct London Link!
Is this a humorous post? Are you being serious? There are just a few problems:
1) Capacity
2) Speed/Length of journey
3) Stock
4) Operator
The MML is full almost too bursting point; especially at the South end. You have got EMT/FCC before you add in the extra Thameslink stuff. The "domestic" station at St Pancras is 4 platforms and is often full. See the RUS!
I am pretty sure the S&C is full almost also, before you even think about using the WCML or the ECML. Oh and good luck trying to shoe horn anything else through platforms 13/14 at MCPICC!
Your first proposal misses out Leeds which is, I would suggest, the source of the majority of passengers on this run. You suggest a meander around Yorkshire, serving some strange places. Do you think there is a market for Barnsley/Wakefield to Glasgow? And who is going to get a train via Dumfries when you can change at Carlisle or Leeds for a faster train to Glasgow.
Your second proposed route would take about 17 years! And it serves no real sources of revenue after Manchester & misses out Sheffield another large city and potential revenue source. How do you propose to win customers from Virgin or TPE? Your service would be MUCH slower.
Which stock are you going to use? Where is it going to come from?
Who is going to operate the service? EMT? XC? A.N . Other?
I am not trying to be argumentative - this just doesnt make sense as a proposal
You could suggest, just, a service Leeds-Glasgow or even Derby/Nottingham - Glasgow via the S&C but I just cant see where the business case sits.
Perhaps as a first action you could extend some of the Northern Carlisle-Leeds services into a Carlisle- Nottingham
Pathing is a major problem as is suitable (any) stock to run the services. Plus there are already faster services to London from Glasgow and from almost all points between. How will you win customers? How will the fares reflect the loss of time against ECML/WCML or even TPE/XC from further north?
Sorry - just cant see how you could make this work.