Running 20 minutes early, 37800 Cassiopeia approaches Circourt Bridge, Denchworth, on 19 December 2025 with the 5Q57 07:35 Alexandra Docks Junction to Derby Litchurch Lane, conveying former South Western Railway EMU 455723. A month earlier the unit had travelled in the opposite direction, also behind 37800 Cassiopeia. However, before it could be cut up, Unimetals Recycling went into administration.