The present day Senedd was formed as the Assembly under the Government of Wales Act 1998, by the Labour government, following a referendum in 1997. The campaign for a 'yes' vote in the referendum was supported by Welsh Labour, Plaid Cymru, the Liberal Democrats and much of Welsh civic society, such as church groups and the trade union movement. The Conservative Party was the only major political party in Wales to oppose devolution.The election in 2003 produced an assembly in which half of the assembly seats were held by women. This is thought to be the first time elections to a legislature have produced equal representation for women.