A chap near where I used to live was cutting down some old trees and mangled his chainsaw chain on a large piece of shrapnel, since we're not near any battlefields the only thing it could have come from was this which crashed nearby:
There is quite a bit of unexploded ordinance south of us though around the old Atomic Weapons Research Establishment, and the occasional German mine or US flare washes up on shore or gets stuck in a fishing boats net from time to time. I found an old US battery box whilst walking the dog years ago, took me a while to figure out what it was.
