There has been little research into the impact of textbook costs on higher education in the United Kingdom. To better understand textbook use patterns and the issues faced by UK students and educators the UK Open Textbooks Project (2017-2018, http://ukopentextbooks.org/) conducted quantitative survey research with United Kingdom educators in September 2018. This article reports on the findings of this survey, which focussed on awareness of open educational resources; textbook use and rationale; awareness and use of open textbooks; and open licensing. Results reveal fertile ground for open textbook adoption with potential to support a wide range of open educational practices. The findings indicate strategies for supporting pedagogical innovation and student access through the mainstream adoption of open textbooks.