Few autistic adults perceive that health and social care professionals have good understanding of autism. The countywide Autism Champion Network evaluated here, is an equal partnership of both staff across sectors (Autism Champions) and individuals with lived experience. Autism Champions take knowledge gained back to their teams to support continuous development of services to meet autistic need. This evaluation aims to examine the professional Autism Champions’ perceptions of (1) the knowledge gained through their local network and (2) the enablers and potential challenges of disseminating and applying the acquired knowledge. Seven health and social sector professionals participated in semi-structured interviews with thematic analysis identifying the themes ‘Learning from People’, ‘Makes you think of things in a different light’ and ‘There’s so much going on . . . ’. Results indicated that knowledge of autism gained from networking outside their own team was used and valued more than the professional presentations. It included signposting, sharing resources, using contacts to answer questions, and informal learning from autistic people. These results have implications for developing learning for Tier 2 and above staff. In addition, they could inform the development of future Autism Champion Networks to expand professionals’ knowledge of autism to reduce health and social care inequalities. Lay abstract The Autism Act 10 Years On found few autistic adults thought health and social care professionals had a good understanding of autism. Autism training has been made law in the United Kingdom for health and social care staff to tackle health inequality. The county wide Autism Champion Network evaluated here is an equal partnership of interested staff across sectors (Autism Champions) and autistic experts by virtue of lived experience (Autism Advisory Panel). With knowledge flowing both ways, the Autism Champions take learning back to teams to support continuous development of services to meet autistic need. Seven health and social sector professionals from the Network participated in semi-structured interviews on sharing knowledge of autism gained with their teams. All participants provide care and support for autistic people, some working in specialist positions. Results showed that developing new relationships with people outside their own team to signpost to, answer questions and share resources, and informal learning from autistic people, was more valued and used in practice than information gained from presentations. These results have implications in developing learning for those who need above a basic knowledge of autism and may be useful for others considering setting up an Autism Champion Network.