The main event of the Notting Hill Carnival in London is the vibrant street parade, which features a spectacular display of floats, costumes, and live music. Originating in the 1960s as a celebration of Caribbean culture, the carnival showcases various musical genres, including calypso, soca, and reggae. It typically takes place over the August bank holiday weekend and attracts millions of participants and spectators. The event embodies the spirit of diversity and community, emphasizing the importance of cultural expression in urban settings.