The operation of the tagging system by Group 4 Securicor is monitored closely by a dedicated Home Office team. This includes monthly audits of performance against 19 reported service levels. Failure to meet the agreed levels of performance results in deductions from the amount paid for delivering the service.
All types of electronic monitoring equipment, including new designs and developments in existing equipment, are rigorously tested before being brought into use. Also, the technical processes and procedures operated by Group 4 Securicor are subject to an annual technical audit carried out by the Home Office.