The Government needs to introduce a levy on plastic bags, Lib Dems activists have said.
Under the proposed scheme, revenue from the new tax would be spent on community food initiatives. The new Lib Dem policy was ratified by the party's members during a vote at their conference in Brighton.
Vince Cable has predicted that the next election will result in another hung parliament, during his conference speech in Brighton.
The Lib Dems arrived in Brighton on Saturday in glorious sunshine. Day two of their conference, and the heavens opened.