Since 2010 the Defence Nuclear Safety Regulator (DNSR) has issued five safety improvement notices and has not issued any immediate safety requirement notices. Prior to April 2015 the DNSR Annual Assurance Reports, available on GOV.uk, detail the assurance activity conducted by the Regulator. Since this date the reports and contents have been redacted in full, to ensure our capabilities are not compromised. Detailed information on findings for the period specified is not held centrally and could be provided only at disproportionate cost. Such detailed information would be subject to security classification that would limit disclosure.