http://www.bailii.org/
The British and Irish Legal Information Institutes website, a huge collection of British and Irish case law and legislation, European Union case law, Law Commission reports, and other law-related British and Irish material free of charge and in English.

http://www.statutelaw.gov.uk/
The UK Statute Law Database. It is the official revised edition of the primary legislation of the United Kingdom made available on-line for free and in English.

http://www.publications.parliament.uk/pa/ld/ldjudgmt.htm
The page offers House of Lords judgements from 14th November 1996 on, free and in English.

http://www.privy-council.org.uk/output/Page31.asp
This website contains judgements of The Judicial Committee of the Privy Council from 1999, as well as several judgements before 1999. They are available free and in English.

http://www.scotcourts.gov.uk/index.asp
The Scottish courts website. It provides Court of Session opinions from September 1998 on, including opinions in commercial cases from January 1998 on, as well as Criminal opinions of the High Court of Justiciary, including opinions in some sentence appeals for free in English. It also contains a broad variety of additional information and material concerning Scottish courts.