In my experience corn spurrey (Spergula arvensis) is not a common weed of cultivation in Dorset. This is a plant that does not like lime soils and much of Dorset's arable farmland is up on the downs, the lowland acid soils tend to be heath and acid grazing, not much in the way of arable crops are grown on acid soils.
Corn spurrey is a low growing, rather straggly plant but it has attractive little white flowers with the green sepals clearly visible behind the petals. It does not have much in the way of leaves, just whorls of thin needle-like leaves. It is a member of the chickweed family and has much in common with its relatives.As with many weeds it seems, it is a strange combination of crop weed and food crop!
Read more: Corn Spurrey: the farmers ruin | Nature Notes from Dorset