Invaders

Available for over a year

Immigration's a hot topic in parliament at the moment, but some Mps are now turning their intention to invaders of a very different kind. Killer Shrimps, Zebra Mussels and Japanese Knotweed are on a hit-list of number of foreign plants and animals which a Commons committee says are invading Britain at an alarming rate. The Government's now being warned they're harming native wildlife and even humans. Our reporter Matt Cole has been to the Wetland and Wildlife Trust's Conservation centre in Barnes to find out more: