Yellow wild flower for ID please.

Yellow wild flower for ID please.

Observation - Yellow wild flower for ID please. - UK and Ireland. Description: Same chalky wasteland as the last few. I don't know if the precipice is significant but it has found itself in full sun. Thanks for looking.

Same chalky wasteland as the last few. I don't know if the precipice is significant but it has found itself in full sun. Thanks for looking.