There are a lot of things to consider when designing online interfaces – not least compliance with data protection, consumer and competition laws.
As part of a joint effort to encourage companies to design their online choice architecture (OCA) in a responsible and compliant manner, the UK’s Information Commissioner’s Office (ICO) and Competition & Markets Authority (CMA) published a joint paper on Harmful Design in Digital Markets and announced a joint collaboration to tackle harmful practices as part of the Digital Regulation Cooperation Forum.
Matthew Hunt, Alice Esuola-Grant and Elisa Lindemann analyse the paper, raising some concerns from the piece and discussing in more detail the Five key harmful OCA practices that featured in the paper.


/Passle/5f3d6e345354880e28b1fb63/MediaLibrary/Images/2025-09-29-13-48-10-128-68da8e1af6347a2c4b96de4e.png)
/Passle/5f3d6e345354880e28b1fb63/SearchServiceImages/2026-06-24-15-52-32-251-6a3bfd401a6aa73137b8ed5f.jpg)
/Passle/5f3d6e345354880e28b1fb63/MediaLibrary/Images/2025-04-24-13-30-15-563-680a3ce71f52562e73495f5e.png)
/Passle/5f3d6e345354880e28b1fb63/SearchServiceImages/2026-06-24-08-47-09-714-6a3b998d756e37d2346f08c8.jpg)