 Regrowth occurs from the branches or trunk of fallen trees which root into the underlying soil.Growing in river valleys and floodplains, the trees can be uprooted by floods and grow again in a new location.Accounts of other traditional customs on 29 May are usually linked to Royal Oak Day (Oak Apple Day) and include the surviving customary rights in Grovely Wood at Great Wishford, Wiltshire, and Garland King Day at Castleton (Derbyshire).