66169 passes a field of oilseed rape near Radley on 5 May 2016, as it gets into its stride with the lengthy 4O39 9:43 Morris Cowley to Southampton Eastern Docks covered car carriers, with BMW Minis for export. The smoke obviously gives away the fact that the loco is still working hard to get the heavy load moving, but at the time I didn't notice the little circular puff of smoke. It almost looks like those dust marks you used to get on older digital SLRs before the advent of automatic sensor cleaning!