
Complete Marketing and Advertising
Full-Service Agency
A Leading Full Service Agency
End-to-End Marketing and Advertising Expertise
We often consult with ambitious, fast-growth brands who have prime opportunities to scale – but who have either had less-than-incredible success with previous approaches or have recognised that gaps in the expertise, knowledge and resources they have access to are limiting their potential.
As a full service agency, we offer something different as an all-senior collective of advertising, marketing, creative, data analysis, market research, media buying, and purchasing professionals. We bring together every essential aspect of successful advertising in one place.
Our focus is on bridging long-standing gaps, blending digital marketing, media buying and cohesive brand creatives as an integrated service that eliminates information silos and enables us to deliver market-beating results through high-performance and fully managed campaigns.
Why Use a Full-Service Advertising and Marketing Agency?
A full-service hybrid agency ensures your approach is holistic, creating unified and cohesive marketing and advertising strategies that apply across channels, platforms, mediums, formats and locations – delivering the best in consumer consistency and strong brand identity.
We offer numerous areas of niche experience, in specialisms ranging from digital marketing and out of home advertising to ad optimisation and high-footfall media bidding, ensuring every advertising opportunity delivers optimal success.
For brands and businesses, the outcomes are compelling, where one multi-skilled team is typically considerably more efficient and creates higher returns on advertising spend than would be feasible when consulting with multiple providers, vendors, or ad hoc marketing functions.
Whether you’re looking for cross-channel, highly targeted campaigns that deliver the best in exposure frequency and repeat touchpoints, want to position your brand in a high-competition environment, or break into a lucrative overseas market, the One Day team is here to make it happen.
Why One Day?
Our track record speaks for itself. When we work with a new client, we always start with a thorough, deep-dive discovery process, which gives us vital intelligence about your brand position, your ideal customer persona, the resources you have to hand, and how we can align your propositions and messaging with the core priorities, trends, and sentiments of your desired audience.
From there, our services are infinitely scalable and adaptable, supporting every project from initial creative concept idea sharing and research through to activation. This is all backed by an accomplished media management and monitoring service that provides real-time, accurate insights into how each aspect of your campaigns is performing.
Put simply, our all senior teams utilise all the resources at our disposal to create customised plans for tactical brand growth, always based on your aspirations, objectives and specifications.

Full-Service Advertising: Key Services
Latest Out-of-Home Campaigns.
See below our selected work in media planning and buying, click or tap to view.
Technology Services - International OOH Campaign
FMCG - Out-of-Home Campaign in Ireland.
Non-Alcoholic Beer - Out-of-Home Campaign & TV

Meet the Media Planning Team
Klaudia
Media Planning & Buying
Laurence
Media Planning & Buying
Scott
Media Planning & Buying
“At One Day Agency, we offer a 360-degree approach to advertising, ensuring that your brand is seen, heard, and remembered across every touchpoint. From creative strategy and compelling content to precision-targeted digital campaigns and high-impact OOH placements, our full-service expertise ensures seamless integration across all channels. Whether you’re looking to amplify your brand's presence in the UK or create a cohesive multi-platform campaign, we deliver innovative solutions that drive results and fuel growth.”
Ricardo Seixas, Founder and CEO, One Day Agency
Frequently Asked Questions.
-
It is a proven fact that even the best media plan won't be successful if your ads, creatives, placements, or graphics aren't up to par.
Swapping and changing between platforms or channels, or cross-purposing low-quality marketing to extend the usage of one piece of work is often more detrimental than successful.
This is where a full-service agency steps in. We ensure you understand the specific audiences, best-practice marketing formats, and technical aspects of advertising in each space. We also create consistent and branded promotions that feel natural in each setting and prompt the impressions and engagement you want to see.
You can read our blog here: What is a full service agency?
-
We provide full access to our in-house expertise as and when required, conducting in-depth market and competitor research, high-level media planning, creative strategic input, and insights into the best ways to portray your brand through any chosen format or channel.
The primary contrast between One Day and any standalone marketing, creative or advertising agency is that we offer a full set of services with one point of contact and work closely to ensure your returns are accumulative – establishing new goals, targets and ambitions along the way as you grow, scale, and maximise interest from new audiences
-
Our UK teams are based in Manchester, but we also have offices within London and Warsaw and manage a huge range of out-of-home and digital advertising initiatives spanning Europe, Asia, North America and beyond – as a truly international team who can secure high-demand advertising placements in the world’s largest and most exciting cities, or emerging markets with strong potential for success.

Full-funnel Advertising Agency
International Media Planning and Buying.
Advertise across the Globe
Media Environments
What our clients are saying…
Get in touch today.
Frankfurt Advertising and Media planning.