Invasive non-native species menace the River Waveney's biodiversity, but River Waveney Trust volunteers and partners are fighting back. Accidentally introduced plants and animals from across the globe invade British waters. While many are harmless, some wreak havoc on native wildlife.

Join Liam Smith of Norfolk's Non-native Species Initiative as he discusses the key species affecting the River Waveney and innovative approaches being used to combat their impact