Courtesy of our partners at the NBCC, we have been supplied with an updated Border Operating Model published by the UK government. This is the latest version, but as yet there is little guidance on rules of origin, and the Anglo-Irish border, where the rules are not yet decided. Download the guidance at
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/925140/BordersOpModel.pdf