The Local Government (Boundary Changes) Regulations 2018

Part 1 of the Local Government and Public Involvement in Health Act 2007 (c. 28) (“the 2007 Act”) enables the Secretary of State, by order under section 10, to make boundary changes in relation to local authorities including changes which result in the abolition of existing local government areas and their councils and their replacement with new local government areas and councils.

Link: The Local Government (Boundary Changes) Regulations 2018
Source: Legislation .gov.uk