Tyndall gave a speech at a BNP event in which he claimed that Asians and Africans had only produced "black magic, witchcraft, voodoo, cannibalism and Aids", also attacking the Jewish leader of the Conservative Party, Michael Howard, as an "interloper, this immigrant or son of immigrants, who has no roots at all in Britain". The speech was filmed by undercover investigator Jason Gwynne and included in a 2004 BBC documentary, "The Secret Agent". On 12 December 2004, these comments resulted in Tyndall being arrested on suspicion of incitement to racial hatred. That month, Tyndall was again expelled from the BNP, this time permanently. The police then charged him, although he was granted unconditional bail in April 2005. Tyndall died of heart failure at his flat—52 Westbourne Villas in Hove—on 19 July 2005. He had been due to stand trial at Leeds Magistrates' Court two days later. He was survived by his wife and his daughter, Marina.