During WW2, the Medmerry area was an isolated and unpopulated stretch of coastline, perfect for RAF training. A practice bombing range was established and used throughout the war.
Both practice (inert) and live weapons were dropped on the intertidal area in large numbers. The range was mainly used by army cooperation squadrons in the close air support role. Aircraft would approach from the inland and drop various weapons on coastal target markers.
This section of coastline is particularly susceptible to erosion. Buried UXO is therefore more likely to resurface.