Black crowberry. Empetrum nigrum. Crowberry Family. Fruit. — The black drupe is berrylike, globular, and incloses six to nine seedlike nutlets with a seed in each. The calyx is at the base and the stigma is at the apex. The drupes are solitary in the leaf axils. They are juicy, acid, edible, and serve as food for the Arctic birds.
Source: wiktionary
Other maloid genera with hard nutlets are Cotoneaster, Hesperomeles, Osteomeles, and Pyracantba, but each of these is quite different from Mespilus and Crataegus.
Source: wiktionary
The only other identifiable plant macrofossil present was a nutlet of club-rush that was morphologically most similar to grey club-rush (Schoenoplectus cf tabernaemontani). This form of club-rush is most often found near the sea, although it also grows in marshes and dune-slacks.
Source: wiktionary