How has coalition government affected party politics in the UK? A coalition government is a government in which two or more political parties are in power, reducing the dominance of any one party within that coalition. The usual reason given for this arrangement is that no party on its own can achieve enough votes to gain power. The UK currently has a First Past the Post electoral system which is not designed to create a coalition government and so the now coalition government is the first we have experienced in the UK. The arrival of a coalition government formed between the Liberal Democrats and the Conservative Party in 2010 has affected UK party politics in various ways. The governing of a country by a coalition of two political parties with differing political stances will involve negotiation between and some degree of compromise on behalf of the two parties. This is necessary in order to ...