That's how I see it.
--- old post above --- --- new post below ---
I see it that way. There was such waste of experience and equipment by not having a rolling program of electrification. I feel that in the UK we really under value practical experience and training. An example is how many useful people for Signalling and Telecoms work left the UK after the railways were privatised. It is probably a bigger problem than the skills gap for electrification and of course most electrification schemes are dependant on re-signalling. These engineers are not going to bring their families back to the UK just in case the respect for technical people has changed - no sign of it changing btw.
--- old post above --- --- new post below ---
Not sure about your dates ?. Surely Manchester was reached way before 1976 ?. Maybe Preston was 1963 and Manchester/Liverpool 1966 ?. That would then mean Glasgow was 11 years after Preston not 1 year after.
I remember the class 50 locomotives were built to take to take the West coast intercity trains beyond Preston to Glasgow, Carlisle etc.
Just found this on Wikipedia
https://en.wikipedia.org/wiki/West_Coast_Main_Line#British_Rail_era
Digested completeion/service dates are
1960 Crewe - Manchester,
1962 Crewe - Liverpool,
1965/66 Crewe - London,
1967 London - Birmingham,
1974 Weaver Junction (North of Crewe-Liverpool) - Glasgow.
So Glasgow was reached 8-9 years after London got connected to Liverpool & Manchester.
I forgot the truth

- that the WCML electrification started in the North (of England) rather than working North from London. So it worked South from the "Northern Powerhouse". Scotland came last though.
Mind you the Glasgow suburbs were electrified way before the London trains arrived behind electric locomotives. They had state of the art (

) sliding door trains (class 303 "blue trains") introduced in 1960 while us English had to wait decades for the slam door stock to start to disappear - forty years to completely disappear in the case of London !.