GopherCon UK 2021 was held in-person at the Brewery in London, requiring proof of vaccination or a negative COVID test for entry, and adhered to government guidelines. Hosted by Mat Ryer, the conference featured a variety of engaging talks, including Bryan Boreham's keynote on building large systems, Tiago Mendes' session on coordinating data changes in distributed systems, and Daniela Petruzalek's presentation on indie game development in Go. The event also covered topics like acceptance tests, Behavior-Driven Design (BDD), and test coverage in Go, with speakers such as Riya Dattani, Chris James, and Eleni Fragkiadaki providing insights. Additionally, Tom Camp discussed creating a chat app to learn new programming languages, while Alex Ellis shared the development journey of OpenFaaS. The conference concluded with acknowledgments to organizers, technical staff, and speakers for their contributions, and all sessions were made available on YouTube for broader access.