Minor party is a political party that plays a smaller (in some cases much smaller, even insignificant in comparison) role than a major party in a country's politics and elections. The difference between minor and major parties can be so big that the membership total, donations, and the candidates that they are able to produce or attract are very distinct. Some of the minor parties play almost no role in a country's politics because of their low recognition, vote and donations. Minor parties often receive very small numbers of votes at an election (to the point of losing any candidate nomination deposit.) The method of voting can also assist or hinder a minor party's chances. For example, in an election for more than one member, the proportional representation method of voting can be advantageous to a minor party as can preference allocation from one or both of the major parties.
Minor parties in Australia owe much of their success to the proportional representation method of voting. This allows minor parties to achieve at least one quota in the electorate or state and thus gain representation in a parliamentary chamber. Often minor parties have been so successful in gaining such representation that they are able to hold the balance of power in the particular house of the parliament (usually the Australian Senate. Some examples are the Democratic Labor Party (DLP) in the 1960s and early 1970s, the Australian Democrats from the late 1970s until 2004, and more recently the Australian Greens.
The use of first past the post in the United Kingdom means that in the post-War era, only two parties have had a majority in parliament: the Conservative Party and the Labour Party. However, strong regionalist movements and the potential for parties to take votes in the centre or extreme fringes of the political spectrum mean that minor parties still play a significant and increasing role in British politics. The Liberal Democrats, and their predecessors the SDP–Liberal Alliance and the Liberal Party have achieved significant numbers of seats and have occasionally been kingmakers (such as during the Lib-Lab pacts and the 2010–2015 coalition with the Conservatives) and are sometimes also classed as a major party. The nationalist Scottish National Party and Plaid Cymru hold a significant number of seats in their Home Nations, with the SNP controlling 56 of 59 Scottish Westminster seats at the United Kingdom general election, 2015, and every single Northern Irish seat is held by a regional party – either the republican Sinn Féin and Social Democratic and Labour Party, or the unionist Ulster Unionist Party and Democratic Unionist Party. As of 2015, the Green Party and the Eurosceptic UKIP also hold one seat each, and UKIP is the largest British party in the European Parliament.