On the contrary, 1981 was a really "slow year". The Royal Scot had already had 8 mins added in 1980, bringing the schedule to 5hrs 08. In 1981 it was extended to 5hrs 26.
In 1974 the average journey time of Euston-Glasgow trains was 5hrs 08, in 1981 it was 5hrs 28.
Overall most WCML schedules had 4 mins added in the 1981 timetable.
Ah right, fair enough. I was more considering the frequency out of Euston and the maintenance of the 1974 pattern when making that comment, rather than looking at the timetables in depth. (The ABC timetable on Timetable World does not show full timetables away from the 'NSE' area, only a list of services from London to main stations showing departure and arrival times).
Were these slowdowns due to extra stops, recovery time, lots of freight services, or something else?
On a related point, 12.40 Reading-Stafford 15.39 was quite a slow schedule for an XC service one year later, in 1982, so perhaps generally this was an era of relatively slow schedules. Even slower was 14.00 Stafford-Reading 17.18 in 1983, though this was a Sunday schedule which have always been on the slow side
1985 wasn't brilliant, but by no means as bad. Furthermore, every Euston-Glasgow was timed for 110mph so most were faster than 1980 at least but it wouldn't be until 1989 that services were properly accelerated on the WCML to take fuller advantage of the 110mph sections.
Again my comments re. 1985 were related to reduction in frequency and a less 'clockface' pattern - and this was as much related to 'NSE' services as intercity services. In the 80s I generally 'rated' the railways by frequency of service, and the mid-80s did seem a low point by this measure. By contrast 1989 seemed quite a high point.
Was it 1989 when a clockface pattern came back, incidentally? Presumably once everything was 110mph then they could create a less complex pattern. I do remember full clockface coming back sometime in this period, for example for a while it was xx00 every hour Euston to Manchester. This was a bit of a 'blank' period in my WCML knowledge though, I didn't travel that way much from about 1987 to 1995 and by the time I did again, Virgin had taken over (though admittedly the early Virgin days still had the 'BR' feel with the 86s and 87s still very much present...)