Press representations of autism and autistic people both reflect and help shape public attitudes towards autism and neurodiversity and may establish critical barriers to social integration for autistic individuals. This study examined such representations in UK newspapers in the period 2011-2020 using a corpus-based approach. It also considered how press representations changed over time and differed with regard to reporting style (tabloids vs broadsheets) and political orientation (left- vs right-leaning). We created the "Autism UK Press Corpus," which included all documents ([approximately]24K) referring to autism in 10 national newspapers. We used document counts (normalised by newspaper size) to assess the 'newsworthiness' of autism. We also employed a synergy of corpus-based and critical-discourse-analysis methodologies to study lexicogrammatical patterns and uncover explicit and implicit attitudes towards autism. Our results showed that the coverage of autism increased slightly over time, especially in broadsheets and left-leaning newspapers. Newspapers emphasised adversities associated with autism, often used negative language, and tended to focus on boys. These representations shifted gradually towards more difference-based descriptions and included more diverse age/gender groups, especially in broadsheets and left-leaning newspapers. We discuss the broad implications of these findings for the autism community and those interested in a more inclusive society.