A British term used to describe a systematic catalogue of recorded archaeological remains, with details of the location, character, history of investigation, and interpretation of each item, usually maintained by a local government agency for use in spatial planning and as a public information source. Such records typically comprise a digital database (text and mapping) with supporting hard‐copy documentation such as illustrations and reports, although increasingly records are fully digital and available online. In 2000, the SMRs in England held about 1 million separate records of archaeological items. Early SMRs tended to be based on spatially definable geographic units or points of archaeological interest, but many modern systems differentiate ‘events’ as time/space definable interventions or engagements with archaeological material (e.g. excavation, watching brief, survey, surface find, place‐name, etc.), and ‘monuments’ as interpretative units based upon the evidence recording during definable events. As the scope of SMRs has expanded to include historic features across a broad range of landscapes, townscapes, and seascapes (e.g. hedgerows, ancient trees, bogs, shipwrecks, submerged forests, etc.), the term Historic Environment Record (HER) has become more popular; a Sites and Monuments Record covering a recognized country is known in the UK as a National Monuments Record (NMR).