Trifolium ornithopodioides Bird's-foot Clover C DD N
This is another tiny member of the clover family but it seems to stand out better from its surroundings such that I can see it when standing up. It tends to grow in short cropped grass so can be hidden unless probing the loose blades of grass away.
The other name which I have known this plant by is Fenugreek but that can be confused with the European herb and arable crop Trigonella foenum-graecum so perhaps "Bird's-foot Clover" is a better common name.
Although we found it inland its distribution is mostly coastal: it is found along the coasts of Wales, southern and eastern England but only occasionally in Scotland and eastern Ireland.