Each of the available electronic services contains a different range of law reports. In order to be sure of finding a case you need to know which dataset to use.
Some cases are available in many sources, others in only one.
The Justis family of databases contain the following sets of reports Electronic Law Reports - these are a version of The Law Reports 1865. These contain 25 separate series. 1945- See Citations for The Law Reports for a list of the series with abbreviations. How to Use Westlaw Lexis Contains decisions from English courts as reported in over 45 law reports series since 1936. Although Lexis has the broadest coverage of case law, it is quite difficult to use How to Use Lexis Printed sources The Library has a good collection of law reports.