47727 Caisteal Dhun Eideann / Edinburgh Castle slowly passes South Marston on 16 May 2023 with the 5Q66 10:09 Willesden to Long Marston ECS, conveying EMU 701013 for storage. It was about to cross over onto the up line, to approach Swindon on the 'wrong' line. This was because 802112 with the 1C11 11:02 Paddington to Bristol Temple Meads GWR service was right behind it. Having missed out its stop at Challow, the 47 was running 22 minutes early. By missing out further stops, it would be 72 minutes early by the time it got to Gloucester!