Temporary and permanent disfigurement at Challow on 21 March 2016. The portakabin will presumably disappear once the Great Western Mainline electrification is complete, but the new palisade fenced enclosure in the background is obviously here to stay! 66705 Golden Jubilee passes these eyesores on 21 March 2016 with the 6M40 11:56 Westbury to Stud Farm ballast empties.