Body-Worn Video
Body-worn video is one of the most widely deployed and most independently evaluated technologies in UK policing. The evidence on one outcome is consistent and statistically significant: officers wearing body-worn cameras have significantly fewer complaints lodged against them than those who do not.
The College of Policing What Works evidence base, drawing on a Campbell Collaboration systematic review of thirty studies, reaches a clear conclusion on complaints reduction.1 The evidence on use of force is more mixed — research does not show consistent or statistically significant effects across all deployments. Results vary depending on activation policy, training quality, and how consistently cameras are used. The camera is not the variable. The operational framework around it is.
There is also a justice system dimension that is often underreported. BWV footage is increasingly cited as a factor in earlier guilty pleas — reducing the number of victims required to give evidence in court. The evidence base here is promising but not yet consistently quantified across forces.
For officers, the human case is just as significant as the operational one. Fewer complaints means fewer investigations. Fewer escalations means fewer injuries. Technology that reduces the likelihood of a physical confrontation escalating is not just an efficiency story — it is a story about what people carry home with them at the end of a shift.
1 College of Policing Crime Reduction Toolkit — Body-Worn Cameras, July 2021. Based on a Campbell Collaboration systematic review of 30 studies. college.police.uk/research/crime-reduction-toolkit/body-worn-cameras
What the evidence shows
Sector-level evidence from independent research across multiple forces and evaluation periods.
A consistent and statistically significant reduction in complaints lodged against officers wearing body-worn cameras versus those who are not — a 16.6% reduction across 22 studies in the meta-analysis. Effects on use of force are mixed across deployments and not statistically consistent. Evidence on guilty pleas and officer injury is promising but not yet consistently quantified across forces.
College of Policing Crime Reduction Toolkit, July 2021 — synthesising a Campbell Collaboration systematic review of 30 studies across multiple forces and outcome measures. The most credible independent evidence base currently available for BWV in UK policing.
This page currently holds sector-level evidence only. If you are aware of a specific force-level BWV deployment with named outcomes and an independent source, submit it via the Contribute link.