In Pepper v Hart 1993, the House of Lords allowed it to be considered to help identify the meanings of words, subject matter, and aims of parliament
Judges have said that Hansard should only be used when words are ambiguous
Law reform bodies, such as the Law Commission, report to the government on proposed changes to laws identified as being in need of change
Traditionally, these cannot be referred to when interpreting the law
In the Black-Clawson case 1975, it was used to identify the mischief or gap in the law