🔗 Share this article British Police Forces Lobbied to Employ Discriminatory Face Scanning Technology Law enforcement agencies across the United Kingdom effectively campaigned to deploy a facial recognition system acknowledged as biased against females, young people, and individuals from minority ethnic backgrounds, following complaints that a more accurate version produced fewer potential suspects. The Technology in Practice UK forces utilize the police national database (PND) to carry out searches using historical face recognition. This process entails comparing a reference photograph of a person of interest against a database of over 19 million custody photos to find potential matches. Acknowledged Discrimination The UK interior ministry conceded last week that the technology was flawed. This acknowledgment came after a study by the government's National Physical Laboratory found it misidentified people of Black and Asian heritage and women at much greater frequency than Caucasian males. The Home Office stated it “took steps on the findings”. “This raises the issue of whether this technology only becomes useful if users tolerate biases in ethnicity and gender. Operational ease is a weak argument for disregarding fundamental rights.” Long-Standing Problem Official papers reveal that this discriminatory flaw has been recognized for over twelve months. Furthermore, police forces argued to overturn an earlier ruling that was designed to mitigate the problem. Senior officers were informed of the algorithmic discrimination in late 2024. The Home Office-commissioned laboratory study found the system was had a higher probability to suggest false positives for images depicting females, Black people, and those aged 40 and under. A Reversed Decision In reaction, the National Police Chiefs’ Council (NPCC) mandated that the confidence threshold required for possible hits be raised to a level where the disparity was significantly reduced. However, this decision was reversed the following month following complaints from police that the adjusted system was generating fewer “investigative leads”. Internal records show the stricter setting cut the number of queries that yielded potential matches from over half to a just under 15%. Profound Inequalities Although the Home Office and NPCC refused to say what threshold is now in operation, the recent NPL study discovered the system could produce incorrect matches for women of Black heritage almost 100 times more frequently than for Caucasian women at specific configurations. The ministry stated on these findings: “Our evaluation identified that in a limited set of circumstances the algorithm is more likely to wrongly flag some population segments in its search results.” Balancing Utility and Fairness Describing the effect of the brief increase to the system's accuracy setting, the NPCC documents state: “This adjustment significantly reduces the effect of discrimination across protected characteristics of ethnicity, age and gender but had a significant negative impact on police efficiency”. The papers add that forces argued that “a previously useful tool now delivered results of limited benefit”. Wider Implementation Proposals Meanwhile, the government has launched a two-and-a-half-month public review on its plans to expand the use of biometric scanning systems. The minister for police the relevant minister has described the tool as the “most significant advance since DNA matching”. Criticism from Advisors and Monitors Abimbola Johnson, chair of the independent scrutiny and oversight board for the national policing equality strategy, said: “There was scant discussion through equality strategy sessions of the facial recognition rollout even with clear relevance with the strategy's goals. “These revelations show once again that the pledges to combat discrimination policing has made through the equality initiative are not being translated into broader operations. Independent assessments have cautioned that new technologies are being rolled out in a context where ethnic inequalities, weak scrutiny and faulty information gathering continue to exist. “Any use of facial recognition must adhere to rigorous official guidelines, be subject to external review, and demonstrate it reduces rather than compounds ethnic bias.” Official Statement A government representative stated: “We takes the findings of the study seriously and we have already taken action. A new algorithm has been externally evaluated and procured, which has no statistically significant bias. It will be tested early next year and will be subject to evaluation. “Our priority is protecting the public. This revolutionary tool will assist police to put criminals and rapists behind bars. There is officer review in each stage of the process and no further action would be pursued without trained officers carefully reviewing the results.”