At first I hesitated to name this Hop trefoil (Trifolium campestre) as it’s a new plant for me but, when I posted some photos online, I got a thumbs up from a botanist and, looking at the ID guidance on the Naturespot website, I think it meets the criteria:

Short, hairy, erect plant. Trifoliate, leaflets oval, narrowed towards the base, the central one short stalked. Flowers pale yellow, becoming pale brown eventually, 4 to 5 mm long in small, globose, stalked heads to 15 mm across

And

… Larger and paler than Lesser Hop-trefoil, and turns brownish with age. Both trefoils are similar to Black Medick in flower, but Black Medick leaves are much more hairy and have an apiculate point (i.e a short fine ‘needle’ from the end of the leaflet)