- The Nuclear Safeguards Act 2018 (Commencement No. 1) Regulations 2018
- The Return of Cultural Objects (Revocation) (EU Exit) Regulations 2018
- The Plant Health (Wales) Order 2018 / Gorchymyn Iechyd Planhigion (Cymru) 2018
- The Insolvency (Scotland) (Company Voluntary Arrangements and Administration) Rules 2018
- The Sustainable Drainage (Application for Approval Fees) (Wales) Regulations 2018 / Rheoliadau Draenio Cynaliadwy (Cais am Ffioedd Cymeradwyo) (Cymru) 2018