Britain's most easterly inhabited island, reached only by the Strood, a causeway that floods on high spring tides and regularly cuts the island off, which shapes everything from delivery times to opening hours for local businesses.
Oysters are the local industry, not a gimmick: Colchester Native and Rock oysters are grown in the creeks off the island, and Coast Road is home to The Company Shed and the West Mersea Oyster Bar, which pull day-trippers from London and beyond.
A heavy marine and leisure cluster for a town of 7,000, West Mersea Yacht Club, Dabchicks Sailing Club, boatyards, moorings, holiday lets and beach huts, plus the annual Mersea Week regatta in August.
West Mersea had a recorded population of about 7,221 at the 2021 census.