On 20 April 1968, the Conservative Member of Parliament Enoch Powell delivered a speech to a Conservative Association meeting in Birmingham that would become one of the most contentious moments in modern British political history. Often referred to as the Rivers of Blood speech, the address focused on the issues of immigration and race relations in the United Kingdom. In his remarks, Powell criticised the levels of immigration from the Commonwealth and expressed strong opposition to the proposed anti-discrimination legislation of the time, arguing that it would create social division.

The speech was characterised by its inflammatory rhetoric, most notably the speaker's claim that he felt like a man watching a nation busily engaged in heaping up its own funeral pyre, and his reference to a constituent who feared that in this country in 15 or 20 years time the black man will have the whip hand over the white man. The title of the speech was derived from his quotation of a constituent who predicted that the Tiber would foam with much blood, a metaphor Powell used to illustrate his warnings regarding the future of race relations in Britain.

The immediate political fallout was significant and swift. Following the delivery of the speech, the leader of the Conservative Party, Edward Heath, dismissed Powell from the shadow cabinet, stating that the remarks were racialist in tone and liable to exacerbate tensions. Despite his removal from the front bench, the speech resonated with a segment of the public, leading to widespread protests and strikes by dockers and meat porters in London who marched in support of Powell.

The event remains a pivotal moment in the post-war era, highlighting deep-seated anxieties and divisions regarding national identity and demographic change. Its legacy continues to influence discourse on immigration and political communication in Britain, serving as a frequent reference point for the boundaries of acceptable political debate. The key elements of the event include:

• The delivery of the speech by Enoch Powell in Birmingham.
• The intense public and political reaction to his warnings on immigration.
• The immediate dismissal of Powell from the Conservative shadow cabinet by Edward Heath.
• The emergence of public demonstrations in support of the speech.
• The enduring impact on the national conversation surrounding race and community relations.