Electronic monitoring, both of curfews and using satellite enabled tags to monitor an individual’s whereabouts, is a vital tool in protecting the public and robustly monitoring offenders in the community. It supports probation staff and the police in managing offenders and defendants safely in the community, delivering the orders of the court and helping to tackle the problems which lead to offending. Data that identifies the number of non-compliance events that lead to breach action is not held centrally and could only be identified at a disproportionate cost.