 Three UK political parties recognise the cause of Cornish self-determination, the Liberal Party, the Cornish section of the Green Party of England and Wales and the Communist Party of Britain.However, in the 2015 general election, the Liberal party in Cornwall withdrew its candidates, and encouraged its supporters to vote UKIP

An Gof have also expressed Cornish nationalism, though not in political ways as much as violent ones.The principal political party in the Cornish Nationalist movement is Mebyon Kernow which labels itself as a 'centre-left, green and decentralist party' and has close association with its sister party Plaid Cymru in Wales.