1700 - 2hrs 44 (Scottish Pullman)
I've had a look at this one - In 1992 it was Right-Away non-stop to Darlington from King's Cross (arrive 19:12) and then Newcastle (19:44) and Edinburgh (21:12). To my knowledge this was the longest Non-Stop run during
INTERCITY days.
I had never understood the need to miss out a stop at York - with the speed limit through the station at 20 MPH it didn't save much time.
By the Winter 1994 timetable (I don't have the ones in between to hand) it had a stop at York (18:48), and that added 4, 3 and 2 minutes on to the 1992 times at Darlington, Newcastle and Edinburgh respectively.
Weekdays, 15:00 from London to Glasgow was booked to Newcastle in 2hrs 39 minutes with a stop at York.
In the Summer 1992 timetable this was the other Scottish Pullman and called York (16:43) Newcastle (17:36) Edinburgh (19a01, 19d04) Motherwell (19:44) Glasgow Central (20:05).
This couldn't beat the fastest Euston - Glasgow train which at that time was the 10:25 Royal Scot which called Preston (12:43), Lancaster (13:01), Carlisle (13:54) and Central (15:12) but was extremely impressive as far as Edinburgh.
This thread brings back many happy memories!
Of course back then the line was far less full. There was no Grand Central or Hull Trains, and there was typically 3 or occasionally 4 trains per hour from King's Cross generally like this:
xx:00 Glasgow or Edinburgh (call York, Darlington, Newcastle - Occasional ones extra stops at Peterborough or Doncaster)
xx:05 Leeds (Peterborough, Grantham, Newark, Retford, Doncaster, Wakefield)
xx:30 Newcastle (Peterborough and then one other stop to York and then Northallerton, Darlington and Durham)
There was an occasional additional service (10:35 Hull, 15:50 Bradford FS, 17:50 Cleethorpes).