(30 Jan 2024, 4:36 pm)54APhotography wrote Your red line is almost exactly the route of the Shildon to Newport line which crossed the ECML at Ricknall and joined the Stillington line at Redmarshall. Was a freight route and even electrified under the the NER.
It is the line I believe, it's all still in situ ie. road bridges etc, don't believe there's any overbuild on it, at all. Don't see any reason why instead of going over the ECML, it couldn't curve onto it. Would be a massive massive coup for the likes of Bishop Auckland etc to get a direct fast connection to all the jobs without sitting on a bus for 3 hours every day.