Question: On the east coast between south Lincolnshire and Hunstanton in Norfolk is one of England's largest estuaries. What's its name?
Sentence (from "Heart Peterborough"): 102.7 Heart Peterborough (formerly Hereward FM) was an Independent Local Radio station for Peterborough, Boston, King's Lynn, Cambridgeshire, south Lincolnshire and west Norfolk.
Relevant evidence: No