"Explanatory Notes are documents that explain the purpose of a Bill. All Government Bills and some Private Members' Bills have an accompanying Explanatory Note. They can be found among the 'Bill documents' on the relevant Bill page" https://www.parliament.uk/site-information/glossary/explanatory-notes/ (accessed 20 November 2020)
Online access to judgment transcripts and reported cases
If the case you need only has a neutral citation then you will have to use one of the online sources to find the judgement. If it has a citation to a law report series the choice of database can become crucial. For example, only LexisLibrary gives holders of an Oxford SSO online access to the All England Report series (All ER in a citation); only Westlaw Edge UK has the Environmental Law Reports (Env LR); Lloyds Law Reports are only available via a separate database, i-law.
Principal sources for English/UK case law
Specialist court & tribunal for hearing judicial review applications
The Administrative Court and the Upper Tribunal (Immigration and Asylum Chamber or UTIAC) which has Judicial Review powers in relation to most immigration decisions.
Printed law reports
UK (& English & Welsh) law report series are shelved on Floor 2, in section with shelf marks beginning Cw UK 100 to Cw UK 200.