Nearly one million UK adults had their drink spiked last year, and most never called police

Approximately 2% of UK adults, roughly one million people, had their drink spiked in the past year. Three-quarters of them never reported it to police. Those are the headline numbers from the most comprehensive national survey on drink spiking conducted to date, a collaboration between forensic scientists at Anglia Ruskin University and the alcohol charity Drinkaware, with fieldwork carried out by YouGov.

The survey, which polled 7,256 UK adults in summer 2025, will be presented publicly for the first time on March 21 at a Cambridge Festival event hosted by ARU.

Who gets spiked and where it happens

The demographic breakdown confirms some expectations and complicates others. Women accounted for 58% of reported spiking cases, but men made up a substantial 42%, a figure that challenges the common perception of spiking as an exclusively female problem. The age group reporting the highest number of incidents was adults aged 25 to 34, not the 18-to-24 bracket that often dominates public discussion of nightlife safety.

The most common locations were bars (41%), social events (26%), and nightclubs (25%). The social events category is notable because much of the public awareness around spiking focuses on commercial venues with CCTV and security staff. Spiking at parties, gatherings, and other informal settings may be harder to detect and even less likely to be reported.

Drink spiking encompasses more than slipping a drug into someone's glass. The definition includes adding any substance, whether illegal drugs, pharmaceutical compounds, or simply extra alcohol, to a person's drink without their knowledge. A bartender pouring a double when a single was ordered qualifies. So does a friend adding spirits to a non-drinker's cup. The range of substances and methods is part of what makes detection and prosecution so difficult.

Why 77% of victims stay silent

The survey's most troubling finding may be the reporting gap. Only 23% of victims contacted police. The two most common reasons given for not reporting were nearly tied: 39% said they didn't believe police would take action, and 38% said they couldn't clearly remember what had happened.

Both reasons point to structural problems. The skepticism about police response reflects years of widely reported frustrations with how law enforcement handles spiking complaints. Without a positive test or corroborating evidence, many cases are difficult to investigate, and victims know it. The memory gap is inherent to the crime itself: many spiking substances cause amnesia, sedation, or confusion, making it harder for victims to piece together what occurred, let alone provide the kind of detailed account that an investigation requires.

There's a bitter circularity here. Low reporting rates mean police statistics dramatically undercount the problem. Undercounting makes it harder to argue for dedicated resources. Fewer resources mean less investigative capacity, which reinforces victims' belief that reporting is pointless.

The forensic detection challenge

Beyond the survey data, the ARU Spiking Research Team conducts laboratory research into the chemistry of spiking. Dr. Lata Gautam, Associate Professor in Forensic Science at ARU, specializes in drug analysis and the detection of substances in spiked drinks. Her team evaluates both the types of biological and drink samples that can be tested after a suspected spiking and the growing market of consumer anti-spiking products: drink-testing kits, color-changing nail polishes, and lid covers marketed as protective devices.

The consumer products present a mixed picture. Some drink-testing kits can detect certain common spiking agents, such as GHB and ketamine, but none can screen for the full range of possible substances. False negatives are a real risk, and a negative test result might give false reassurance. Dr. Gautam's team has been systematically evaluating these products against known spiking agents, work that is especially important given that the products are being marketed with safety claims that may outstrip their actual capabilities.

The forensic challenge extends to clinical samples as well. Many spiking drugs are metabolized quickly. GHB, one of the most commonly suspected agents, has a detection window of only a few hours in blood and roughly 12 hours in urine. If a victim doesn't seek medical attention and testing quickly, which many don't given the confusion and shame that often follow a spiking incident, the chemical evidence may be gone before anyone looks for it.

Four years of tracking a hidden crime

The ARU-Drinkaware partnership began in 2021, and the YouGov surveys have been conducted periodically since then to track prevalence trends. The 2025 survey, with its sample of over 7,000 adults, is the largest to date and provides the most statistically robust estimate of spiking prevalence in the UK.

Previous survey rounds showed similar patterns but with smaller samples, making it harder to draw firm conclusions about demographic breakdowns and reporting behavior. The consistency of the roughly 2% prevalence figure across survey waves suggests that spiking is neither a sudden epidemic nor a fading problem. It appears to be a persistent, underreported form of assault that has become normalized as a background risk of social drinking in the UK.

Annabelle Bonus, Director of Research, Strategy and Impact at Drinkaware, described the scale plainly: with more than a million people affected annually, it is essential that victims feel able to report the crime.

What the numbers don't capture

Survey-based estimates carry inherent limitations. The 2% figure relies on self-reporting, which means some respondents may have experienced spiking without recognizing it, particularly if the substance caused amnesia. Others may attribute symptoms like unexpected intoxication to spiking when other explanations exist. YouGov's methodology is well-regarded for population surveys, but the sensitive and stigmatized nature of the topic means the true figure could be higher or lower than the estimate.

The survey also doesn't capture the full range of consequences. Spiking is most commonly associated with sexual assault, but it is also linked to theft, physical violence, and, in some cases, incidents described by perpetrators as pranks. The psychological aftermath, including anxiety, loss of trust in social settings, and hypervigilance around drinks, extends well beyond the event itself but is not measured by prevalence surveys.

What the data does make clear is that drink spiking in the UK is not a rare occurrence limited to a few high-profile cases. It is widespread, underreported, and inadequately addressed by current reporting and detection systems. Whether the Cambridge Festival presentation and the ongoing ARU research will change that picture depends on factors well beyond the reach of any academic study: policing priorities, legislative attention, and the willingness of institutions to treat spiking not as an inevitable feature of nightlife but as a crime that deserves serious response.