On arrival at Diss station Andy and I became aware

of an interesting train approaching in the distance. Initially, all we could see was a large slab of yellow on the long straight north of the station, however, as it got closer we realised it was class 37. 37425 and 57301 'Scott Tracy' pass through Diss forming an unidentified Norwich Crown Point to Willesden light engine move, regrettably, we did not get a reporting number for this train, if anybody has any details at all we would be grateful!.