66651 approaches Circourt Bridge, Denchworth, on 20 March 2025 with the 6B33 13:52 Theale to Robeston empty oil tanks. This was running along the down relief line as booked, but it rejoined the main line at Challow without stopping, as the 1B18 14:12 Paddington to Cardiff Central GWR service, which should have overtaken it, was running 17 minutes late.