Security firm G4S has apologised for overcharging the Government for its provision of electronic tagging services, calling its actions "unacceptable".
The group's chief executive Ashley Almanza said:
The way in which this contract was managed was not consistent with our values or our approach to dealing with customers.
Simply put, it was unacceptable and we have apologised to the Ministry of Justice.
We remain committed to working with the Ministry and the UK Government to resolve this matter and to provide enhanced oversight of service delivery and contract performance.
More top news
Changes to energy supply have helped reduce carbon emissions but the UK still has far to go to meet ambitious carbon emission target.
Conservative and nationalist parties in Austria have agreed a coalition that will make 31-year-old Kurz Europe's youngest leader.
The Which? annual survey saw British Airways languishing near the bottom for passenger satisfaction in both short and long-haul.