(25 Nov 2014, 12:30 pm)Scott wrote By spark effect do you mean that new trains on the ECML will encourage more passengers to use the train, and therefore use the Tyne Valley line to get to the ECML?
There may be a connection, but in terms of the 'spark effect' on the Tyne Valley line, it is to do with electrification on that line and numbers increasing as a result.
http://railway-history.walkingclub.org.u...ffect.html