Salmon and other fish can swim the full length of the River Severn, thanks to a project to open up the river. The Environment Agency opened up the final 15km (nine miles) stretch by removing weirs and building a fish pass at Felindre Mill, near Llanidloes.

It has been a long and perilous journey, but otters have finally managed to swim back from the brink of extinction and into every county in England. View the video

The new website from the RESTORE partnership for promoting ecological river restoration in Europe will be launched at the end of August.

Otters and salmon will benefit from a £110m boost in spending on England's lakes, rivers and streams, the government has said.

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