Dale and Appelbe's pharmacy and medicines law (12th edn) by 
Rules and Guidance for Pharmaceutical Manufacturers and Distributors (Orange Guide) 2022 by The source for all UK legislation and is the best place to check the details of specific acts of parliament and related documents.
A good starting point, providing links to trustworthy information from many sources.
For subjects like pharmacy, it is very important to make sure that any information you use on law and legal matters is of high quality, relevant to the UK and up-to-date.
This will be just as true in practice after graduation as it is in academia, if not more so!
This page gives some useful sources for this.
The two most useful sources for UK legal information available through the libraries are LexisLibrary and Westlaw. Both available from all 3 Universities at Medway. To access them, you will need to go through your university's A-Z of databases and e-resources.
Provides access to some of the most important sources for law in this country, such as Halsbury’s Laws of England and the All England Law Reports, as well as a large amount of case law and legislation.
A large database of law sources including legal journals, business information, news, legislation and case law.
Other sources:
Has a focus on international constitutional law, but also provides access to some legal journals.
Provides a legal search engine, with a focus on legislation and case law around the world.
Access to UK case law from the 1980s to the present.
Provides searchable access to all publications from the UK parliament from 2006 onwards.