66420 passes Circourt Bridge, Denchworth, on 7 September 2021 with the 4L36 07:39 Wentloog to Felixstowe North freightliner. Having left Wentloog 95 minutes late, this was still running an hour behind time here, and consequently had no need of the relief line, where it was booked to stop. Therefore it was travelling at full speed on the main line.