158861 forms a class 2 stopper from Cardiff to Swansea departing at 1738 as 2B71.
66208 approaches with a rake of empty BDA flats. It is probably 6H26 1524 Llanwern to Margam working as it took a loaded slab train to Llanwern earlier in the day.
I think it is a fair guess that the driver will have shut the power handle and let the train be taken down the bank by gravity but being kept under control with the brake.
