The rugged, wild beauty of Essex’s North Sea beaches is not a novel holiday destination, but rather one that is slowly being rediscovered. Whilst it may not offer the classic coves and cliffs seen in places like Cornwall, the coastal landscape of Essex is certainly a sight of open skies and classic English shores. Somewhere along the 350 miles of Essex’s coast, sprinkled with faded seaside resorts, sits Mersea Island. In between the Colne and Bl…