Winter aconite seedlings
I noticed a few patches of destinctive seedlings and it seemed that they were all near to the Winter aconites.
After a bit of reseaerch I am fairly sure that these are in fact seedlings from the Winter aconites.
They have an interesting lifecycle. These seedling leaves are all you get in the first year. In year two they have small leaves with many lobes. By the third year, the leaves look something like the adult plant. Flowers happen in the fourth year, or perhaps the third according to one source.