Britain First is a far-right and ultranationalist British political organisation formed in 2011 by former members of the British National Party (BNP). It was founded by Jim Dowson, an anti-abortion campaigner linked to Ulster loyalist groups in Northern Ireland. The organisation's leader is former BNP councillor Paul Golding, and its deputy leader is Jayda Fransen.
Britain First campaigns primarily against multiculturalism and what it sees as the Islamisation of the United Kingdom, and advocates the preservation of traditional British culture. It attracted attention by taking direct action such as its "Christian patrols" and "invasions" of British mosques. It has been noted for its online activism.
Britain First has unsuccessfully contested elections to the House of Commons, the European Parliament and the mayoralty of London. In November 2017, it was statutorily deregistered as a party by the Electoral Commission.