Analysis from the Office for National Statistics suggests there is a discrepancy between police records of crimes and the Crime Survey for England and Wales (CSEW).
The CSEW works by "asking people whether they have experienced any crime in the past year," whereas police records are based on officers recording offences in their patch.
The differences between these methods may give rise to discrepancies, although the exact reason why police records appear to overstate crime reduction is a matter of controversy.
More top news
The business group is warning Theresa May she is running out of time to make progress on a Brexit deal.
The attacks came as Erdogan promised to expand Turkey's border operations against a US-backed Kurdish group in the fight against IS.
The Office for Product Safety and Standards will manage responses to large scale product recalls and identify risks to consumers.