Complex sentence: The Criminal Intelligence Branch (which Covert Policing was a branch of before SO Designations were devised) was formed in March 1960, and provided surveillance on known criminals, keeping pace with criminal methodology and technology.
Split into simpler sentences: The Criminal Intelligence Branch (which Covert Policing was a branch of before SO Designations were devised) was formed in March 1960. It provided surveillance on known criminals and to keep pace with criminal methodology and technology.