Chris Philp

That is a good point; we must ensure that the operating procedures are adhered to, and I will come on to that a little later. However, to be absolutely clear, if someone is identified as a match, a normal criminal investigation is conducted to normal criminal standards. Nobody is convicted on the basis of this evidence alone—or, indeed, on the basis of this evidence at all. Let me come to the question about racial disparity. When this technology was first introduced, about seven years ago, there were reports—accurate reports—that there was racial bias in the way that the algorithm operated. The algorithm has been developed a great deal since those days, and it has been tested definitively by the national physical laboratory, the nation’s premier testing laboratory. NPL testing is the gold standard of testing and this technology has been tested relatively recently. For the benefit of Members, I will read out what the results of that testing were: “The NPL study found that, when used at the settings maintained by the Met”— that is the 0.6 setting that the hon. Member for Brent East (Dawn Butler) referred to earlier— “there was no statistically significant difference in the facial recognition technology’s accuracy across” different demographic groups. In other words, the technology as it is being used today—not five years ago, when there were issues—has been certified by the NPL and it has been found that there is not any racial bias at the settings used.