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Quagga mussel Europe "could Britain watercourse penetrate"

October 13, 2014 at 19:34 clock Updated BST

Scientists warn that the shrimp and mussels in Turkey and the Ukraine could conquer waterways of Britain, and kill native species.

The quagga mussel was discovered near Heathrow Airport, and as productive race can block pipes and may cause flooding.

The researchers are also concerned that native species could devastate.

The BBC reports Philippa Thomas of Wraysbury River.