Legislative Reform Orders, formerly know as Regulatory Reform Orders, are an unusual form of delegated legislation as they may amend primary legislation. The Legislative and Regulatory Reform Act 2006 and the Regulatory Reform Act 2001 extended the provisions of the Deregulation and Contracting Out Act 1994 enabling the Government to amend or repeal a provision in primary legislation which is considered to impose a burden on business or others. This is done through a Legislative Reform Order formerly known as a Deregulation Order.
The relevant government department must first draft a proposal for the order and consult representatives of those who are affected. After considering the results the Government may change all or part of the proposal or withdraw it completely.
Further information on this subject can be found from the following links.
House of Commons Regulatory Reform Committee
House of Lords Select Committee on Delegated Powers and Regulatory Reform