Pc Blakelock, who was 40, was attacked and stabbed dozens of times as he tried to protect firefighters tackling a blaze at a supermarket, during the height of the Broadwater Farm riots in 1985.
Nicholas Jacobs, 44, who is accused of killing him, will appear at Westminster Magistrates' Court tomorrow.
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As soon as the information went missing in early January, the Ministry of Justice say they launched an urgent investigation.
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