Chesil Beach and The Fleet SPA is located on the south coast of England in Dorset. It is a long linear shingle beach (Chesil Bank) enclosing a brackish lagoon (the Fleet). The Fleet is the largest and best example of a barrier-built saline lagoon in the UK and Chesil is one of the three major shingle structures in the UK. The salinity gradient, peculiar hydrographic regime and varied substrates, together with associated reedbed and intertidal habitats and the relative lack of pollution in comparison to most other lagoons, have resulted in the Fleet being extraordinarily rich in wildlife. Outstanding communities of aquatic plants and animals are present, supporting large numbers of wintering waterbirds, including Dark-bellied Brent Goose Branta bernicla bernicla. In spring and summer, Chesil Bank is an important breeding site for Little TernsSterna albifrons which feed in the shallow waters of the lagoon, as well as adjacent waters outside the SPA.