66142 rejoins the mainline at Seaton Snook Junction on 15 September 2001, after traversing the short branch to Seaton-on-Tees (Hartlepool Nuclear Power Station), with the Pathfinder Tours 1Z27 20:22 Newport to York 'Blyth & Tyne Meanderer' railtour. 56089 can just be seen on the rear of the train.