OOH advertising that gets seen on the street and shared online
Updated October 2026.
Prohibition is an out-of-home (OOH) advertising agency in Leeds. We design and plan billboards, transport, retail and digital screen campaigns, and join them up with PR and social so one poster becomes a bigger story. For C4 Energy, the US pre-workout brand launching in the UK, our creative ran on the London Underground, at WHSmith London Victoria and on digital screens in PureGym sites across the country.
What is out-of-home advertising?
Out-of-home advertising is any advert people see outside their homes: billboards, bus and rail sites, street furniture, shopping centres, gyms, airports and digital screens. It is one of the few channels people cannot skip or block, and digital OOH can change by time of day or location.
Why use OOH advertising?
OOH builds fame and trust fast, puts your brand where people shop, travel and work out, and gives PR and social something to point at.
It builds awareness
Big, simple creative in busy places puts your brand in front of large audiences again and again.
It reaches people near the point of purchase
Retail and station sites catch people close to where they buy. C4’s WHSmith London Victoria creative ran alongside its retail launch.
It works harder with PR and social
A striking OOH execution gets photographed, posted and written about, so it reaches far beyond the people who walk past.
Our OOH advertising services
Strategy, creative, media planning and buying, production and reporting, across these formats:
Billboard Advertising:
Billboards and large format
Roadside, city centre and large format sites designed for maximum impact in a few seconds.
Transit Advertising:
Transport
Underground, rail, bus and airport sites that reach commuters and travellers, such as C4’s London Underground campaign.
Street Furniture Advertising:
Retail and street furniture
Shopping centres, bus shelters, kiosks and in-store sites near the point of sale.
Digital Out-Of-Home Advertising:
Digital OOH
Digital screens in stations, gyms and city centres, with creative that can change by time or location.
Our design team creates the artwork, and our video production and animation teams make motion versions for digital screens.
How do we run an OOH campaign?
1. Objectives and audience
We agree who you need to reach, where they are and what you want them to do.
2. Creative idea
We develop one clear message and a design that works in a glance, at every size.
3. Planning and production
We choose sites and formats, book the media, and produce and install the artwork.
4. Amplify and measure
We extend the campaign with PR and social media, then report reach, search and social lift, web visits and sales.
Why choose Prohibition for OOH advertising?
Creative, media and PR under one roof
We worked with C4 Energy to launch it into the UK market, combining OOH, digital ads and social. Our C4 creative ran on the London Underground and at WHSmith London Victoria, alongside digital ads in PureGym sites across the country. Because creative, paid advertising, TV advertising and PR sit in one team, your OOH works with everything else you run.
Read the C4 Energy creative case study
How much does OOH advertising cost?
It depends on the formats and locations, how many sites and how long they run, whether you use digital screens, and the creative and production you need. We give you a written quote after a first call, or you can contact us now.
Talk to Prohibition about OOH advertising
Tell us where your customers are and what you want them to do. Prefer to talk? Call us on 0113 430 4160.
Our Latest Creative Work
What is the marketing function of advertising?
Has the OOH industry grown in recent years?
One of the most significant advancements in technology that has impacted the OOH industry is digital signage. Digital billboards and displays have become increasingly popular, allowing advertisers to create dynamic, eye-catching ads that can be updated remotely and in real-time.
Additionally, the globalization of the advertising industry has opened up new opportunities for out-of-home advertising. As more companies expand their operations globally, they are looking for ways to reach audiences in new markets.
Finally, advertisers are increasingly looking for ways to reach consumers in specific demographics and locations. Outdoor advertising offers a unique opportunity to do this, as it can be targeted to specific neighborhoods, cities, or regions.
Where can you find out-of-home advertising?
Unlike TV or radio ads that can be tuned out or skipped, out-of-home ads are right in front of you as you go about your day – making them a driving force for bringing in new business and reaching a large audience quickly.
Can we help with OOH planning?
We’ll help you to decide where your ads will be displayed based on your audience and budget!
How do we measure out-of-home advertising?
Attribution: Tracks how people interact with your ad across multiple channels. For example, if someone sees your billboard and then visits your website later that day, attribution would track that interaction and give you a better sense of how effective the ad was.
Impressions: This is the most basic measurement for out-of-home ads, and it simply refers to the number of people who potentially see the ad. Impressions can be calculated based on factors such as traffic volume, foot traffic, and the size of the ad itself.
GRPs (Gross Rating Points): GRPs take into account both the reach (the number of people who see the ad) and frequency (how often they see it) of an ad campaign.
The “typical” measurement for OOH ads really depends on the specific goals and objectives of each campaign. We may use a combination of these metrics to get a more complete picture of the effectiveness of your campaigns.
