One turned up in Portsmouth not so long ago, same sort of scenario.

The USAF and RAF had a group tasked with tracing where bombs went in Germany and on the continent. Perhaps Wolfgang can tell us if these things still turn up in Germany.

The Navy inspect the USS Richard Montgomery every three months, as the wreck decays, ordinance onboard falls out, these are then taken away from the wreck and "rendered safe".

The B&MD teams have some very funny stories about disposal, most centre around WWII German ground mines. Two types were almost identical from the outside but one held 50% more explosive than the other - Navy's paid for a lot of windows in their time due to mistaking which was which.