This is a post on their website (https://secure.fera.defra.gov.uk/nonnativespecies/beplantwise/index.cfm
). Not that any of use would bin our plants like this, but its worth knowing.
Be plant wise and don’t dump aquatic plants in the wild.
The Be Plant Wise campaign, launched by Defra and the Scottish Government, is designed to raise awareness among gardeners, pond owners and retailers of the damage caused by invasive aquatic plants and to encourage the public to dispose of these plants correctly. The Horticultural Trade Association, Ornamental Aquatic Trade Association, Royal Horticultural Society, and wild plant conservation charity Plantlife are all supporting the campaign.
We have developed resources with advice for gardeners and pond owners and are working closely with retailers of aquatic plants to provide information in stores. These pages contain the detailed information you need to Be Plant Wise.