Serfdom was on its last legs in England by this stage. I believe there were plenty of landowners who practiced the longbow but a majority would have been yeomen who were tenants of big solid farms, not themselves landowners. England was almost the first place to get rid of serfdom and a peasantry both, though the Netherlands may have it beat. Remember we’re on the verge of the Reformation. These are quite urbanized bourgeois societies by the 1400s.