In Britain, we have more than 3,000 invasive non-native plant and animal species. That’s a big figure, and they have a big impact on our environment, causing damage to property and infrastructure, affecting ecosystems, harming wildlife habitats and out-competing some of our native species. It is worth remembering that only a very small proportion of non-native species become invasive and establish themselves. Plenty of pets, livestock and ornamental plants that are not native to this country are brought here and cause no damage.
Click on the link to read the rest of the article: How to decide what makes the invasive species ‘banned’ list