The annual Cyber Security Breaches Survey (HM Government) (2015-2019)

The Government has surveyed UK businesses to find out they approach cyber security and help them learn more about the cyber security issues faced by industry. The research informs Government policy on cyber security and how Government works with industry to make Britain one of the most secure places to do business online.
The survey is part of the Government’s National Cyber Security Programme.
Cyber security guidance and information for businesses, including details of free training and support, can be found on the National Cyber Security Centre website and GOV.UK at: www.ncsc.gov.uk/guidance and www.gov.uk.
The survey was carried out by Ipsos MORI and its partner, the Institute of Criminal Justice Studies (ICJS) at the University of Portsmouth.

https://www.gov.uk/government/statistics/cyber-security-breaches-survey-2017
https://www.gov.uk/government/publications/cyber-security-breaches-survey-2016