There seemed to be two winter-cresses flowering at the same time.
Wasteland along Hinds river.
Barbarea intermedia, weed, growing on waste ground.
John Steel Survey
this plant was prolific in the old ROW's
Barbarea (winter cress or yellow rocket) is a genus of about 22 species of flowering plants in the family Brassicaceae, native to temperate regions of the Northern Hemisphere, with the highest species diversity in southern Europe and southwest Asia. They are small herbaceous biennial or perennial plants with dark green, deeply lobed leaves and yellow flowers with four petals.