Online sources for Westminster legislation.
Holders of an Oxford SSO are recommended to a subscription database, but there is an official source for UK legislation which is free to all with access to the internet. (Take note of any warnings of yet to be incorporated amendments).
Online access for English and Welsh case law
Once again, holders of an Oxford SSO are recommended to use one of the subscription database, but there are official and reliable sources of case law at least in the form of transcripts rather than reported judgments available to all with access to the internet.
The UK Competition Appeal Tribunal (CAT) "is a specialist judicial body with cross-disciplinary expertise in law, economics, business and accountancy whose function is to hear and decide cases involving competition or economic regulatory issues." (Description from CAT's homepage.)
Neurtal citation is [yyyy] CAT #
Open access sources of transcripts of judgments
Competition and Markets Authority (CMA) (UK)
UK law report series in print
The LawB od shelves its series of English law reports on Level 2, the floor at which you enter the library.
A specialist series you may not have encountered before is
United Kingdom Competition Law Reports at Cw UK 120 U50
Law reports of European Union or European national jurisdictions are on Level 3, one floor above the entrance level.
Law reports from other foreign jurisdictions are on Level 1, one floor below the entrance level.
EU legislation and regulation
Decisions of EU courts