The 1970s saw racial tensions in the area; in 1976 Sikh teenager Gurdip Singh Chaggar was killed in a racist attack. On 23 April 1979, Blair Peach, a teacher and anti-racist activist, was killed after being knocked unconscious during a protest against the National Front (NF). Another demonstrator, Clarence Baker – a singer of the reggae band Misty in Roots, remained in a coma for five months. More than 40 others – including 21 police – were injured, and 300 were arrested.