The Iran-backed terrorists kept the explosive in thousands of ice packs in four properties in northwest London, according to a report in The Telegraph last year. The ice pack deception tactic was used in Germany, as well.

A source was quoted in The Telegraph saying the ammonium nitrate was to be used for “proper organized terrorism” and could have caused “a lot of damage.”

MI5 arrested a man in his 40s for allegedly planning terrorist attacks, but did not find evidence that the terrorists were planning an attack in the UK.