The following guidance on good practice in submitting software outputs to REF 2021 has been developed by the UK Software Sustainability Institute in consultation with REF 2021 Sub-panel 11. It should be read in conjunction with the information already provided in the Guidance on Submissions (REF 2019/01, Annex K) and Panel Criteria and Working Methods (REF 2019/02, Paragraph 254 and Annex B).