This sounds about right.
This webpage has a short history of the Breckland Line, no specific dates re: the units but Norwich got the 156 fleet first around 1988, and a new timetable direct Norwich - Birmingham and Norwich - Liverpool/Blackpool. The current split between Liverpool and Birmingham routes came later, presumably in preparation for privatisation?
If anyone has any, I'd love to see any Regional Railways timetables for the Norwich routes circa 1988/89.
I wish I still had it, but when it was first introduced it was a very odd service with Ipswich in the Mix.
When the super sprinters came out you had.
Norwich - Peterborough -Nottingham - Sheffield - Manchester - Liverpool
Ipswich or Cambridge - Peterborough - Nottingham - Derby - Sheffeild - Manchester - Blackpool North.
Norwich - Peterborough - Birmingham
Cambridge - Peterborough - Birmingham.
The all interworked together to give Ely - Birmingham & Ely - Manchester and hourly service.
By 1991 - Liverpool - Ely via Grantham was hourly (with Derby only served by Extra's in the peak)
Ely - Birmingham
I think Cambridge / Norwich were still served by both routes.
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Not many routes slap me in the face as much as the Nottingham-Cardiff. It would be a perfect fit for Lincoln, even more so now the stoppers run to Newark. The city really has been poorly served for far too long. Alternate extensions to Grimsby would seem a good fit and some more 170s are coming up for grabs in the next few years. Let's hope it will get looked at again.
It will be interesting to see what happens here.
I am hoping that with East Coast serving the city frequently we will see:
Grimsby Town - Lincoln - Nottingham (hopefully beyond to somewhere more useful than Leicester) limited stop.
Newark Castle - Nottingham picking up the slow
Newark Northgate - Lincoln becoming a self contained shuttle with Grimsby passengers changing at Lincoln for ECML South services.
I digress - I am sure this will be discuss when the EMT prospectus is put out.