66621 working hard on the climb towards Sharnbrook tunnel near the village of Wymington leads the 23.50 East Usk Yard (Newport) to Radlett stone train running as 6Z39 (Thanks to Mike for identifying the reporting number). This train follows an extraordinary route from South Wales to Hertfordshire via the Marches line to Shrewsbury then through the heart of the West Midlands to Burton-on-Trent thence south on the MML to Syston junction where it heads east again to Manton Junction then to Corby. Finally, it dashes south on the MML again arriving at its destination. I am not at all sure why it takes this nocturnal and convoluted route that does seem rather wasteful of resources with many more seemingly direct routes available?
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