37800 Cassiopeia takes the up relief line at Wolvercote on 11 March 2021 with the 5Q74 09:47 Burton upon Trent Wetmore Sidings to Reading Traincare Depot, conveying newly converted Class 769 'Flex' hybrid unit 769943 (formerly EMU 319443). The train had left Burton 90 minutes late, but had recovered nearly an hour, and was just 34 minutes late here. This was just a few seconds after the sun had reappeared after a lengthy cloudy period. Just how close I was to the edge of the cloud can be seen from A34 bridge in the background.