The Government Says

DAO 06/26 Protection of the UK's National Security Through Public Procurement

DAO 06/26 Protection of the UK's National Security Through Public Procurement
Local copy of DAO_06-26_Protection_of_the_UK_s_national_security_through_public_procurement__.pdf

https://www.gov.uk/government/publications/dao-0626-protection-of-the-uks-national-security-through-public-procurement

seen at 17:05, 19 June in News and communications.