Practical Legal Research Skills: A Guide for Trainees and Paralegals

Legal research is one of those skills every trainee, paralegal and newly qualified solicitor is expected to already have, yet it is rarely taught in a structured way. Get it wrong and the consequences are not abstract: a misquoted statute, a case relied on after it was overturned on appeal, or a headnote misread under time pressure can end up in a piece of client advice, a pleading or a due diligence report. This guide sets out a practical, repeatable method for legal research, built around the hierarchy of sources, checking whether the law you have found is still current, and keeping a clear audit trail of how you got to your answer.

Start with the hierarchy of sources

Good legal research follows a logical order rather than jumping straight to whatever comes up first in a search engine. As a general rule, work through sources in this order:

• Primary legislation - Acts of Parliament and the statutory instruments made under them. This is the law itself, and where a point is governed by statute, it is your starting and finishing point.
• Case law - judgments that interpret and apply legislation, or that set out common law principles where no statute applies. Case law tells you how a court has actually read and used the law in practice.
• Secondary sources and commentary - textbooks, practitioner works, journal articles and law firm briefings. These are extremely useful for orientation, context and pointing you toward the primary sources that matter, but they are someone else's interpretation, not authority in themselves.

A common error among newer researchers is working this the wrong way round: finding a helpful-looking textbook paragraph or online article and treating it as the answer, rather than as a signpost to the primary legislation or case law that actually needs to be checked and cited. Commentary can be out of date, written for a different jurisdiction, or simply wrong. Always trace a proposition back to its primary source before relying on it.

Checking currency: is this still good law?

Finding a relevant statute or case is only half the job. The next question is always: is this still good law today? Legislation gets amended, repealed or brought into force in stages, and cases get appealed, overruled, distinguished or superseded by later authority. Skipping this step is one of the most common - and most dangerous - research errors.

Checking legislation

On legislation.gov.uk, the free official source for UK law published by The National Archives, every piece of legislation carries both an "as enacted" or "as made" version and a revised version showing the text as currently in force, with amendments incorporated. Always check which version you are looking at - the original enactment is a historical record, not necessarily today's law. The site also flags where amendments have been passed but not yet fully applied to the revised text, so read any "changes to legislation" notices carefully rather than assuming the page is fully up to date.

Checking case law - noting up

The equivalent process for cases is often called "noting up": checking whether a judgment has been appealed, overturned, followed, distinguished or judicially criticised in later decisions. Paid citator tools such as those on Westlaw or LexisNexis make this straightforward by showing a case's subsequent judicial treatment at a glance. Where you do not have access to a citator, you can still note up a case manually by searching for later judgments that cite it, checking appeal histories, and reading recent commentary that references the point of law in question. Never assume a case is still authoritative simply because it appeared high in a search result.

Reliable research tools, free and paid

You do not need an expensive subscription to do sound legal research, but you do need to know which free resources are trustworthy and what their limits are.

• legislation.gov.uk - the official, free source for UK primary and secondary legislation, maintained by The National Archives, with both original and revised versions of most Acts and statutory instruments.
• BAILII (British and Irish Legal Information Institute) - a free database of case law and other legal materials covering England and Wales and other UK and Irish jurisdictions. It is an excellent starting point for locating judgments, though it does not offer the citator functionality of the paid platforms, so it will not automatically tell you whether a case is still good law.
• Westlaw and LexisNexis - the two major paid platforms used across the profession, offering integrated citators, case digests, precedents and cross-referenced commentary. Where your organisation has access, these are usually the fastest way to confirm currency and find related authority in one place.
• Court and tribunal websites, and regulator guidance - useful for very recent judgments or decisions that may not yet appear on other databases, and for primary regulatory material such as SRA guidance.

Whichever tools you use, cross-check important points across more than one source rather than relying on a single database or a single search result.

Keep a research record and audit trail

A good research answer is only half the job if nobody, including your future self, can see how you got there. Get into the habit of recording:

• The exact question you were asked to research, and any assumptions you made.
• Every source you checked, including the ones that turned out to be irrelevant, with dates accessed.
• The version of any statute relied on, and the date it was checked as current.
• Confirmation that any case relied on was noted up, and when.
• Your conclusion and the reasoning that connects it back to the sources.

This record protects you and your firm if the advice is later questioned, makes it far easier for a supervisor to review your work, and saves enormous time if the same or a related question comes up again. Treat it as a standard part of the task, not an optional extra.

Common errors to avoid

• Over-relying on a single source, particularly a single search engine result, blog post or AI-generated summary, without cross-checking against primary legislation or case law.
• Using an outdated version of a statute - quoting the "as enacted" text when the current, amended version says something different.
• Misreading headnotes - the summary at the start of a law report is a helpful guide but is not part of the judgment itself and can occasionally be imprecise. Always check the ratio in the body of the judgment before relying on the headnote alone.
• Stopping too early - finding a source that supports the answer you expected and stopping there, rather than checking for later authority that might contradict it.
• Treating commentary as authority - citing a textbook or article instead of tracing the point back to the primary source it is describing.

It is also worth flagging a newer risk: generative AI tools can produce case citations or statutory references that look entirely plausible but do not exist, or that misstate what a real case actually decided. If you use any AI tool as a starting point for research, treat its output as unverified until you have checked it against a primary source - never cite anything you have not personally confirmed. For a closer look at this risk and how to manage it responsibly, see Learnsignal's guide to verifying AI-assisted legal research and citation risk.

Building this into your professional development

Legal research is not a one-off skill you pick up during training and then set aside. It sits within the wider competence expectations solicitors are held to throughout their careers, alongside areas such as professional ethics, conflicts and client care. Regularly revisiting your research method, and staying current on how legal technology and AI tools are changing the research landscape, is a sensible way to keep this skill sharp and to satisfy ongoing continuing competence expectations. Structured CPD (continuing professional development) is one of the most reliable ways to do this consistently - explore Learnsignal's CPD courses for options covering research method and related practice skills.

FAQs

What is the correct order to research a legal point in?

Start with primary legislation where it applies, then check relevant case law that interprets or applies it, and use secondary sources and commentary to orient yourself and point you toward primary material - not as your final answer.

What does "noting up" a case mean?

Noting up means checking a case's subsequent history to confirm it is still good law - whether it has been appealed, overturned, followed or distinguished by later courts. Paid citator tools on platforms like Westlaw and LexisNexis do this automatically; without one, it must be done manually by searching for later citing cases.

Is BAILII a reliable source for case law?

Yes, BAILII is a well-established free database of UK and Irish case law and is a good starting point for locating judgments. However, it does not provide citator functionality, so you cannot rely on it alone to confirm whether a case is still current - that step needs to be done separately.

Do I need a paid subscription like Westlaw or LexisNexis to research properly?

Not necessarily. Free resources such as legislation.gov.uk and BAILII cover a great deal of what most research tasks need. Paid platforms add speed and convenience, particularly integrated citators, but the underlying method - checking sources properly and confirming currency - matters more than which tool you use.

Careful, well-documented research is a habit, not a one-off effort - build it into every task and it will save you time, and protect your advice, for the rest of your career.