Directives, regulations and other EU legislation can be found on the EUR-Lex site. A 'bibliographic notice' for legislation on the site notes amendments. Consolidated versions of amended legislation are also avialable.
For legislation published from 2015 onwards, standard (OSCOLA) citation incorporates the EU's harmonisation of numbering for EU legal acts.
Citations for legislation contain the following elements:
A 2015 example would be:
European Parliament and Council Directive (EU) 2015/720 of 29 April 2015 amending Directive 94/62/EC as regards reducing the consumption of lightweight plastic carrier bags  OJ L115/11
Citation for a pre-2015 Directive adds the treaty basis to the year and number, e.g.
Council Directive 2010/18/EU of 8 March 2010 implementing the revised framework on parental leave  OJ L68/13
Pre 2015 numbering of Regulations reverses number and year, so that the number preceeds the year. Treaty basis is also given in brackets e.g.
European Parliament and Council Regulation (EU) 600/2014 of 15 May 2014 on markets in financial instruments and amending Regulation (EU) No 648/2012  OJ L173/84
Use 'Legislation' searches in Westlaw UK or the Lexis Library to check for UK implementation. Keyword search using standard brief citations, e.g.
The Eur-Lex website is the official source for European Court judgments. These also appear in print as the European Court Reports.
Many key EU cases are also reported in UK Law Reports.
Online judgments and reports can be found using:
Standard (OSCOLA) citation for EU cases combines the following elements
An example would be:
Case C-59/89 Commission v Germany  ECR I-2607.
A European Case-Law Identifier (ECLI) was introduced in 2015, using four elements. These follow the case number.
The ECLI for C-403/03 Schempp v Finanzamt Munchen, is e.g.
The elements of the ECLI are separated by colons. Paragraphs in judgments are cited as, e.g 'EU:C:2005:446, para 22'.
The ECLI is treated as a neutral citation in OSCOLA citation, preceding the report citation, e.g.
Case C-403/03 Schempp v Finanzamt Munchen EU:C:2005:446,  ECR I-6421.