A last minute find on Realtime Trains is the presumed test train starting at Middlesbrough Sidings at 08:35 this morning (8.1.25), due to reach Bedlington at 14:30, then taking the Hepscott Line towards Butterwell Junction, where presumably it takes refuge in the former disposal point sidings between 14:49.5 and 14:54.5, before heading back to Hepscott by 15:03, taking a trip to Morpeth between 15:32 and 15:34.5, then passing back through Bedlington around 15:45 to head back to Middlesbrough.
If you’re able to, why not try to catch it, especially on the rarer sections of track such as the Morpeth North Curve?