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Fish kill cause discovered

The source and cause of pollution in the River Witham from Bardney Bridge Lock to Boston which has resulted in tens of thousands of fish deaths has been identified.

The Environment Agency is unable to give further details due to ongoing investigations and possible enforcement action. 

Efforts are continuing to isolate the pollution, assist in the clean-up, and mitigate the damage to the environment.

High levels of ammonia have been found in the river. 

Dog owners are still being advised to keep their pets on leads and keep an eye on what they are picking up following the earlier sea life toxin alert.

Dogs have died after picking up infected sea creatures washed ashore in Norfolk and Suffolk and the alert extends to areas around The Wash, including the Boston marshes and tidal river.

The advice to beware all dead sea animals, especially starfish, has been extended after many more were washed ashore by Storm Emma. The Norfolk beaches, especially Hunstanton, have been badly affected.

More information for vets and pet owners can be found at