(18 Nov 2020, 4:08 pm)Andreos1 wrote Someone else suggested this in another thread. I don't necessarily think the re-opening of the line is guaranteed to have a negative effect on the bus network. 

If you look at all of the railway lines which feed in to and out of Newcastle, there is (or appears to be) a solid, reliable bus network of services which complements the rail network.

Hexham - Newcastle.
Prudhoe - Newcastle. 
Blaydon/Metrocentre - Newcastle. 
Middlesbrough - Newcastle. 
Sunderland - Newcastle. 
Durham - Newcastle.
Chester le Street - Newcastle.
Morpeth/Cramlington - Newcastle.
Plus the metro. 

To an extent, Alnmouth/Alnwick and Berwick to Newcastle.

I don't see why it would be different in SE Northumberland.

It's a very different railway line to most of those to be fair though. It's more comparable to the Metro and the routes it's covering are every 30 minute / 20 minutes at best with nothing really left especially for the 1, 19, X7, X8, X9, X10, X11, X21 which will be hit hard from Blyth / Bedlington Station / Ashington / Seaton Delaval / New Hartley end. You've also got the big problem that they're extremely unreliable at rush fault (for no fault of their own) because of numerous bottlenecks; Sandy Lane, Blyth (Cowpen Road), Laverick Hall, Gosforth High Street, South Gosforth, Blue House Roundabout just to name a few.

People will be more happy to use a train which takes 30 minutes from Ashington to Newcastle rather than a bus that might take 55 minutes but it might take longer. You've also got a good connection at Northumberland Park to connect with the Metro so there's more places to go outside and supposedly the new railway line will be under Nexus fares which will allow easier integration with the Metro pricing plus there's going to be free parking at most the stations so people further afield could use them (288 spaces at Seaton Delaval for example, 500 or so at Ashington etc).

The rest of the services you listed above aren't really the same as it's difficult to connect to the Metro so unless your going to Newcastle Centre they're not the best or they're really unfrequent compared to alternative bus(es).

Apart from the 2, 57, 308 and X22 I can see everything else being hit hard.

Oh and the Durham to Newcastle trains will be more popular than the alternative buses, Sunderland to Newcastle is Metro (rather than train) and I wouldn't be surprised that the trains between Hexham and Newcastle will be more popular (it's more people doing intermediate journeys using buses).