Foundations
Part of Out of home creative best practices: 9 principles for UK campaigns
Out of home creative best practices: 9 principles for UK campaigns
Out of home creative best practices for UK campaigns: legibility, copy length, DOOH specs, CAP Code compliance and site testing before you buy the space.
What to take away
- One idea per frame, six words or fewer on roadside copy, and a brand mark that reads from the far lane.
- Match the layout to the format, because a bus side and a 48-sheet rarely share one master artwork.
- Digital screens reward one slow reveal. Fast cuts waste the loop and the money.
- Outdoor ads must meet the CAP Code, and screens that sense people must meet data protection law.
- Prove the artwork on site, at distance, in daylight and after dark, before you commit budget.
Nine principles for out of home creative
- Lead with one idea. A frame carrying two messages halves the recall of both.
- Treat six words as the working ceiling for roadside copy, and spend a few of those words on the brand.
- Set type so the furthest realistic reader can finish the line, not merely the nearest.
- Build contrast rather than decoration. Dark lettering on a pale ground holds up in flat winter light.
- Keep the logo clear of the frame edge and out of the bottom third, where street furniture bites.
- Give digital creative a single reveal. Two frames per loop is plenty.
- Never cut mid-word, and leave the final frame on screen longer than the first.
- Write for the audience that Route audience measurement in the UK reports at that site, not for the audience you assume passes it.
- Photograph the real site, overlay the artwork, then check the day and night versions before approval.
Match the creative to the format
| Format | Sightline | Creative priority | Common mistake |
|---|---|---|---|
| Roadside billboards, 48-sheet and larger | Long, fast approach | One short line and an oversized brand mark | Filling the frame with detail |
| Bus side and six-sheet | Close, slow, seen repeatedly | Bold colour and a tight crop | Assuming a single viewing |
| Digital six-sheet in retail | Queuing footfall at close range | Price and offer legibility | Motion that only works with sound |
| Rail and concourse | Standing audience with time to read | Detail and a second line of copy | Roadside copy reused without change |
The master artwork is the most expensive habit in this medium. One layout reused across every site saves a design fee and spends far more on wasted coverage.
Digital formats add a second variable, which is time. A creative that has to earn attention inside a loop has less room for nuance than a static sheet that stays up for the whole booking.
Write copy that reads at speed
Out of home is read in glances, so the layout has to land before the reader commits to it. A poster is not a press ad with the paragraphs removed.
Punctuation costs space and often disappears on moving stock, so choose words that survive without apostrophes or hyphens. Short verbs beat clever lines.
A call to action only works if someone can act on it within seconds. A nearby street name, a QR code on a queuing format, or a brand people already know are the realistic options.
Where a campaign runs across several formats, keep the idea fixed and rebuild the layout. Changing the idea mid-flight is a media cost.
Keep UK outdoor ads compliant
The CAP Code applies to outdoor media exactly as it applies to search and social, so claims must be legal, decent, honest and truthful.
Digital screens that use cameras, people counters or Wi-Fi analytics to observe passers-by move into data protection territory. The ICO's guidance for organisations sets out the principles that apply.
New structures and large-format sites usually need advertisement consent, which sits inside planning legislation such as the Town and Country Planning Act 1990.
Prove the creative before you buy
Ask the media owner for site photographs taken from the real viewing angle, then drop your artwork into them. Anything unreadable in that test will be unreadable in market.
If you are buying screens through a demand-side platform, build a separate creative set for each loop length. Our guide to buying programmatic DOOH in the UK covers the booking routes and lead times those platforms work to.
Programmatic screens let you swap creative by time, weather or traffic. That flexibility only repays the effort if every variant still obeys the rules above.
Common questions
How many words should an outdoor ad carry?
Roadside copy works best at six words or fewer. Formats where people queue, such as retail screens and concourse sites, can carry a longer line and a price.
Can I use one artwork across every format?
No. Rebuild the layout for each sightline, while keeping the idea and the brand mark identical.
Do digital screens need different creative?
Yes. Frame holds, loop length and motion are creative decisions rather than technical afterthoughts. A still that works in print will look static inside a loop.
What UK rules apply to outdoor advertising?
The CAP Code governs the content of the ad, planning law governs the structure, and data protection law applies where a screen collects information about the people passing it.