Photo released by the City of London Police showing the first "cannabis factory" discovered in the City. City of London Police hide caption toggle caption City of London Police Europe Police Find 1st 'Cannabis Factory' In London's Financial District, Destroy 826 Plants January 21, 2021 Growers likely took advantage of less-populated streets due to the coronavirus pandemic, police say. But the reduction in city traffic also made the cannabis plants' pungent odor more noticeable.