The following statement has been released on behalf of the family of Pc Keith Blakelock.
"The family of PC Keith Blakelock have never given up hope in getting justice for him. We welcome this news, and extend our eternal gratitude to the Metropolitan Police Service."
More top news
Six fire engines and 35 firefighters are fighting a fire in a storage unit near Heathrow Airport.
A woman was taken to hospital by air ambulance after falling from one of Trafalgar Square's famous lion sculptures.
Police are appealing for help in tracing a family of six who are feared to be travelling to Syria.