Sussex and Surry Police

Behaviour Insights for Roads Policing Unit

The question was not “how do we stop someone from driving drunk?” but “who is actually positioned to intervene in that moment?”

Bystander
Bystander effect intervention
Large-scale behaviour change through communications campaign
Layers
100K
Beer mats, billboards and posters
Globe
~1M
Total reach across physical and digital assets
Trend
47%
Increase in social media impressions
Conference
Conference presentation
Psychological Society, Division of Behaviour Analysis (2025)
Law enforcement United Kingdom Communications and behaviour change 2022–2023

The Organisation

Sussex & Surrey Police

Sussex Police are responsible for 1.7 million people within the South England region with an annual budget of £328.9 million and 5,477 employees

The Brief

Sussex & Surrey Police Force wanted an innovative drink driving campaign that leveraged Behavioural insights to combat campaign fatigue within their broader workforce and complacency within the population in relation to Drink-Driving.

The specific audience for this campaign was young males (18 – 34), urban & rural who are drivers that drink (not drinkers that drive).

The campaign had to be impactful, innovative, behaviourally informed and delivered within an 8 week turnaround in time for Christmas 2022. We partnered with Claremont Communications to develop strategy, messaging, brand assets and deliver the campaign.

Our Approach

Our research (qualitative interviews and desktop research) along with our clinical expertise indicated that a by-stander intervention, whereby the message to intervene with a potential drink -driver will be most effective coming from a friend, partner or stranger, would be very effective for this campaign.

As well as this, we developed an escalator of interventions for by-standers to use grounded in the slogan: Prevent, Persuade, Police. (see examples of creative assets below).

100,000 beer-mats, billboards and posters as well as a far-reaching PR & media campaign including features on ITV News led to this campaign winning a National Roads Policing Medal of Order in Sussex in June 2023.

Social Validity was strong for this intervention with both police officer and by-stander acceptability ratings exceptionally high.

The campaign reached almost 1,000,000 people around the country, a 47% increase in social media impressions. Media interest increased by over 120% compared to the previous year. Officers made 369 arrests over the campaign period. Despite an increase in operational activity, this equated to a 10% decrease in arrests compared to the year before.

Finally the award-winning campaign is currently being generalised and adapted by other police forces for their upcoming drink driving & knife-crime campaigns such was the success, innovation and national interest generated.

Looking at the Problem like a Behaviour Psychologist

Understanding the intervention through theory

Bystander Intervention

From: Latané & Darley

What it is

Responsibility diffuses in groups. The more people present, the less likely any one of them acts — each assumes someone else will.

Design decision

The target was reassigned from the drinker to the people around them. The campaign spoke to the group, not the driver.

Applied in: Campaign audience strategy and creative

Social Norms

From: Cialdini, Reno & Kallgren

What it is

Behaviour follows what people believe others do, and what they believe others approve of. Intervention stalls when peers are assumed to disapprove of stepping in.

Design decision

A Prevent, Persuade, Police hierarchy made intervention the expected first response and enforcement the consequence of inaction.

Applied in: Message hierarchy and campaign copy

Point-of-Decision Placement

From: Leventhal, Singer & Jones

What it is

Channel factors: small situational details at the exact moment of choice produce effects far out of proportion to their size. Placement outperforms persuasion.

Design decision

100,000 beer mats placed on tables inside licensed venues — the surface physically present during the conversation about getting home.

Applied in: Physical asset design and venue distribution

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