An amazing piece of luck at South Marston on 24 August 2021. In no more than 20 seconds of sunshine, 66848 heads east along the Great Western Mainline with the 6Y47 05:15 Mountain Ash to Hinksey ballast empties, with 66847 Terry Baker bringing up the rear. As soon as the lead loco had passed me, the sun disappeared again. Although it was a fairly sunny day later on, at this time in the morning the whole area was under a mass of dark cloud, so this was a real bonus.