The National Archives on behalf of HM Government, legislation.gov.uk
legislation.gov.uk provides all legislation from 1988- and "most pre-1988 primary legislation." Most primary legislation is available in "revised" form, which includes amendments. This free site includes all UK Statutory Instruments, Scottish Statutory Instruments and Northern Ireland Statutory Rules from 1987-. This site also now includes the web page: legislation originating from the EU (= EU legislation published before "Exit Day" and EU legislation that will be pertinent to the UK after Exit Day). Additional information about the scope of available material appears in the FAQs.
The search feature allows researchers to retrieve statutes and statutory instruments by title, by year of enactment, by number and by type of legislation.
Westlaw provides statutes and statutory instruments currently in force.
Westlaw: United Kingdom Legislation: Statutes
After retrieving a statute, be aware that link: Analysis yields commencement/status information and amendments, as well as (often) citing cases and (often) cites to journal articles/books.
Westlaw: United Kingdom Legislation: Historic
Westlaw also includes historic versions (from 1992-) of statutes and statutory instruments, "including company commercial, intellectual property, tax, personal injury, litigation and county court rules consolidated by the editors at Sweet & Maxwell." (Derivation: Consolidated Law in Force published by Sweet & Maxwell.)
Lexis Advance provides statutes and statutory instruments currently in force. (Derivation: Halsbury’s Statutes, published by LexisNexis Butterworths.)
Path: LexisNexis for Law School > tab: Go to Lexis Advance > under: Explore Content: tab: International > United Kingdom > United Kingdom Legislation > Statutes of England & Wales
After retrieving a statute, be aware that: Notes (commencement/status information and amendments) appear at the end of the text.
Path: LexisNexis for Law School > tab: Go to Lexis Advance > under: Explore Content: tab: International > United Kingdom > United Kingdom Legislation > choose one of the options (grouped by date): UK Parliament SIs
JustisOne provides statutes (1235-), statutory instruments (1949-) and earlier regulations (1671-) in original form.
JustisOne (PDF) (campus/dorm use or implement proxy instructions) > click: Continue to Justis
There are no usernames and passwords for JustisOne. This database is accessible through the BLS proxy server.
Tip: Try Advanced [search feature] to find an act or regulation.
Tip: Try Browse > Statutes (or Statutory Instruments) > United Kingdom to retrieve specific documents by year.