Hi Colin,
Fantastic - ground truth beats all other sources, so thanks for taking the time for a look. You've also reminded me to get out for a 5k myself! :-)
I've updated the fields to remove the pond, and set landuse=farmland (rather than meadow) to connected fields with signs of tractor tilling.
https://www.openstreetmap.org/changeset/102928638
Would you mind looking at my changes and if all OK, marking Resolved please?
Happy Mapping,

James