21+ active Diffusion promo codes and discounts as of May 2021. Free Diffusiononline.co.uk coupons verified to instantly save you more for what you love. Last Updated: Apr 26, 2019 09:38:02. Diffusion: Designer Clothing for Men & Women. Diffusion offers a wide range of designer clothes for you to browse through. Find the perfect designer clothes for you in our online range. Conceived with the intention of sourcing leading and upcoming brands for new and existing customers, Diffusion understands the significance of fashion in one's lifestyle. Diffusion opened its first multi-brand store over 20 years ago and has since gone on to open several stores across the West Midlands. The company recognised the need for an online presence in effort to reach out to new customers both locally and around the globe. As a result, the company launched its Diffusion Online website offering the very best in Fashion, Life & Style. Diffusion is a forward thinking retailer and has retained all the hallmarks and principles of services on which it was founded. We love your style. In 2006, Diffusion had the opportunity to open its first G-Star Raw franchise in the Bullring shopping centre, Birmingham. It has since opened a further 9 mono-brand stores at key shopping destinations such as Carnaby Street (London), Arndale Centre (Manchester) and St. David's (Cardiff) making it the biggest partner for the Dutch denim brand within the UK.