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Ch Supt Mark Hall said the force would continue to support the families of those who died.

Det Supt Peter Sharp, leading the investigation, said inquries were continuing but there was no wider risk to the public.

Det Supt Lewis Basford said: "Our main priority is to ensure the lines of inquiry identified by the review are progressed. I would urge people to avoid speculation."

Chief Supt Pedro Agudo Novo last month confirmed Lyons and Monaghan were killed within seconds of each other by a lone gunman who fled the scene on foot.

Chief Supt Agudo Novo last month highlighted the "professionalism" of the shootings and the suspect's "perfectly planned" escape from Spain.