The police complaints system in England and Wales is overseen by the Independent Office for Police Conduct (IOPC).

The IOPC collects data from all police forces about the type of complaints they are receiving and how long it takes them to look into what has gone wrong. 

This information is used to produce quarterly performance data for all police forces.

You can view the IOPC’s quarterly complaints statistics for Merseyside Police by clicking at the link below:

Merseyside Police - IOPC data

The IOPC also publish annual police complaints statistics.

You can view the IOPC’s annual statistics report here: https://www.policeconduct.gov.uk/research-and-learning/statistics/police-complaints-statistics