Benacre Broad at low tide

Benacre Broad National Nature Reserve adjacent to the coast in north Suffolk was previously a brackish water lake separated from the North Sea by a narrow barrier of sand and shingle. Now the barrier has been once again breached by the sea, it is a salt-water lake. This is in an area of active coastal erosion (up to 7 metres per year) and currently the highest rate of retreat in the UK.