The park will be locked nightly from October 30 to November 9 between 10pm and 6am, covering the Bonfire Night fireworks period. It will also close from 8pm on December 30 until 6am on January 1.
The decision follows the deaths of 16-year-old Harry Pitman, stabbed during a fight while watching fireworks from the hill on New Year's Eve 2023, and 21-year-old film student Finbar Sullivan, fatally stabbed at the spot in April.
A spokesperson for The Royal Parks said: "The safety of all park visitors is our priority. Closing the park over the Bonfire Night"—the quote was cut short in the original report, but the organisation confirmed the closures in a statement. The park has been closed each New Year's Eve since Pitman's death.
The closures affect one of London's most popular viewpoints, traditionally crowded during fireworks displays and New Year celebrations.