Department of Climate, Energy and the Environment Records relating to SEM capacity market de-rating factors for Demand Side Units (DSUs) during the period 1st September 2021 to 28th December 2022. Records to include, but not limited to; email, email attachments, reports, minutes, memos, meeting materials, presentations, briefings, submission documents and cover notes, consultation documents, consultation responses, consultation decisions, excel or other spreadsheet format documents, modelling outputs, recommendation papers.