Eel passes such as the one shown in the picture have given a boost to the number of European eels in British rivers. The passes allow the eels to wriggle their way up and over the barrier on a bed of bristles so they can get to the other side. Two passes installed in Somerset have seen 10,000 eels queuing up to use them. The Environment Agency now plans to fit a further 100 gates across the country.
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