Electronic monitoring, or curfew, is an effective way of punishing offenders and helping them to stop offending.
A curfew requirement lasts for up to six months. It can be used on its own or with other requirements. It can also be used when an offender is released from prison. The curfew is for at least two hours and up to twelve hours per day, and is often overnight.
The offender is fitted with an electronic tag around the ankle, which they must wear at all times, and a monitoring box is installed in their home. If the offender does not return home for the curfew hours, the monitoring centre notifies the supervising officer. The absence is investigated and breach action can be taken.