Some of the most sensitive digital data in London resides on the servers of the City of London Police. Data must be stored on secure, centrally-managed network drives, rather than local C: drives. The use of e-mail for file sharing is actively discouraged, and is monitored. The department has created a detailed risk-assessment policy that allows officers insight into the process. Officers must file a formal application to download any data onto removable media, and explain what information is involved, how sensitive it is.”]