As of 6 April 2012, RIDDOR’s over-three-day injury reporting requirement has changed. The trigger point has increased from over three days’ to over seven days’ incapacitation (not counting the day on which the accident happened).
Incapacitation means that the worker is absent or is unable to do work that they would reasonably be expected to do as part of their normal work.
Employers and others with responsibilities under RIDDOR must still keep a record of all over-three day-injuries – if the employer has to keep an accident book, then this record will be enough.
The deadline by which the over-seven-day injury must be reported has also increased to fifteen days from the day of the accident. New leaflet available at http://www.hse.gov.uk/pubns/indg453.pdf