56311 passes Oddington on 18 February 2013 with the 6Z91 10:53 Calvert to Didcot Power Station flyash empties. Despite leaving Calvert half an hour early, it had managed to turn that into a 70 minute deficit by the time it passed me! I'm surprised I managed to get this is sun, as the line was still in cloud when it came into view. Luckily the clouds were moving faster than the train, with it brightening up in the foreground literally as I was pressing the shutter!