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The broadcaster and naturalist Steve Backshall has described pollution found in the River Thames as "toxic". Bangor University analysis found high levels of norovirus and E. coli in water taken near the border between Berkshire and Buckinghamshire. Thames Water, which operates the works, said all discharges from the site had been fully compliant with environmental law. The Â鶹Éç's Joe Campbell reports. For more on this story, check the Â鶹Éç News app.