A complaint about nuisance callers is lodged with the UK's data watchdog every five minutes - and eight of the 20 most prolific calls came from the same company, which is not UK registered, we found in January 2017.

For legal reasons we cannot publish the full dataset. However, data on the top twenty calls is provided.

• Line chart: Nusiance calls and messages January-November 2016
• Infographic: Concerns about cold calls
• Bar chart: UK's biggest nuisance callers
• Bar chart: Automated calls: Most complained about subjects
• Interactive map: Which towns are getting the most nuisance calls?