The official campaign group for leaving the EU was Vote Leave.[28] Other major campaign groups included Leave.EU,[29] Grassroots Out, and Better Off Out,[30] while non-EU affiliated organisations also campaigned for the United Kingdom's withdrawal, such as the Commonwealth Freedom of Movement Organisation.[31]
The official campaign to stay in the EU, chaired by Stuart Rose, was known as Britain Stronger in Europe, or informally as Remain. Other campaigns supporting remaining in the EU included Conservatives In,[32] Labour In for Britain,[33] #INtogether (Liberal Democrats),[34] Greens for a Better Europe,[35] Scientists for EU,[36] Environmentalists For Europe,[37] Universities for Europe[38] and Another Europe is Possible.