66846 piles on the power, and spews put some uncharacteristic sooty black smoke, as it leaves the loop at Steventon on 8 March 2014 with the 6V62 11:12 Tilbury Riverside to Llanwern steel empties. This view has now changed, with the demolition of Didcot A Power Station's cooling towers. Didcot B's gas fired plant (on the left) remains.