It is the largest expanse of intertidal mudflats and sand in the United Kingdom , covering a total area of 310 km ( 120 sq mi ) .
Morecambe Bay is a large estuary in northwest England , just to the south of the Lake District National Park .
Morecambe Bay is the largest expanse of intertidal mudflats and sand in the United Kingdom , covering a total area of 310 km ( 120 sq mi ) .
Morecambe Bay is a large estuary in northwest England , just to the south of the Lake District National Park .