Video has become a vital tool for the Metropolitan Police in their fight against crime in the capital.
But increasingly, cameras are being focused on the officers themselves.
This evening, an ITV "Tonight" programme asks if the extra public scrutiny is "helping" or "hindering" their work.
Here's Ronke Phillips.
You can see more of that investigation in "Police - Caught on Camera" at 7:30pm on ITV1 on Thursday 13th September 2011.