This paper examines the current use of simplified language materials (SLMs) by teachers and support staff across England. Drawing on a survey of Primary and Secondary schools it identifies the degree to which teachers and support staff use and produce SLMs. It explores both the contradictions and similarities between practitioners' perceptions of the value of SLMs and the existing research base and policy and professional guidance. It focuses, in particular, on the significance of the perception that SLMs increase comprehension and improves access. It highlights the need to further examine SLM production so as to assess their value as an inclusive education tool.