The English Legal System is based on common law principles, which means that it relies heavily on judicial decisions and precedents established in past cases. Common law is a system of law developed by judges through their decisions and interpretations of legal principles, rather than by legislative enactment.The common law system is derived from the practices and traditions of English courts, which developed over centuries of legal practice. It places a great emphasis on the idea of legal precedent, which means that judges are expected to follow and apply the rulings made in earlier cases to similar cases that come before them.This approach to law means that the principles and rules established in previous cases can shape the outcome of future cases, and it allows for a certain degree of flexibility and adaptability within the legal system.While statutes and regulations are also a part of the English legal system, common law principles continue to play a vital role in shaping and interpreting the law.
In common law systems, judges are responsible for interpreting and applying the law, based on previous legal precedents and the principles of equity and fairness. This means that the law is continually evolving and adapting to new circumstances, as judges develop new legal principles and apply them to different situations. Common law is therefore a flexible and adaptable system, capable of responding to changing social and economic circumstances.Common law is a legal system that relies on judicial decisions and precedent rather than statutory laws passed by legislative bodies. It is a system of law developed over centuries in England and used in many countries that were once part of the British Empire, including the United States, Canada, Australia, and India. Common law is characterized by the principle of stare decisis, which means that courts are bound by previous decisions made in similar cases.
Common law and civil law are two different legal systems that are used in different parts of the world. The main difference between these two systems is the way in which they are developed and applied.
Common law is a system of law that has developed over time through judicial decisions and legal precedents. It is used in countries such as the United Kingdom, the United States, Canada, and Australia. Under the common law system, judges interpret and apply legal principles to individual cases, and these decisions then become part of the body of law that is used to guide future cases.
In contrast, civil law is a system of law that is based on written codes and statutes. It is used in many countries in Europe, Latin America, and Asia. Under the civil law system, laws are codified and written down in advance, and judges are expected to apply these laws to individual cases without interpreting or modifying them.
One of the main differences between these two legal systems is the role of judges. Under the common law system, judges play a significant role in shaping and developing the law, as they are responsible for interpreting legal principles and applying them to individual cases. In contrast, under the civil law system, judges are seen as more passive, and their role is primarily to apply the law as it is written.

Another difference between these two systems is the way in which legal disputes are resolved. Under the common law system, disputes are resolved through adversarial proceedings in which each side presents evidence and arguments to a judge or jury. In contrast, under the civil law system, disputes are often resolved through inquisitorial proceedings in which a judge or panel of judges conducts an investigation and gathers evidence before making a decision.

Overall, these two legal systems have different approaches to the development and application of the law, and each system has its own strengths and weaknesses.
Common law is often contrasted with civil law, which is a legal system that is based on codified laws and statutes. Civil law is used in many European countries, as well as in Latin America, Africa, and Asia.
The development and application of common law has been shaped by a number of factors, including historical traditions, the role of judges, and the relationship between the judiciary and the other branches of government. Common law has also been influenced by other legal systems, such as Roman law and canon law.
In contrast, civil law systems are based on codes and statutes that are created by legislative bodies. This means that the law is more rigid and inflexible, as it is defined by specific rules and procedures set out in legislation. Civil law systems also tend to be more prescriptive, as they rely on detailed rules and regulations to guide legal decision-making.
The history of common law in England can be traced back to the Norman Conquest of 1066, when William the Conqueror introduced a system of royal justice that was based on local customs and traditions. Over time, this system developed into a more formalised body of law, as judges began to create legal precedents based on the decisions they made in individual cases. The development of common law was further encouraged by the emergence of the legal profession in the 13th century, as lawyers began to write legal treatises and commentaries on the law.
There are many examples of common law principles in practice in the English Legal System. For example, the principle of stare decisis, which requires judges to follow legal precedents established by higher courts, is a fundamental aspect of the common law. Similarly, the concept of judicial review, which allows the courts to review the actions of government bodies to ensure they are lawful, is also a key principle of the common law.
The development of the law of negligence in the UK was largely driven by judicial decisions, rather than by legislation. One of the most significant cases in this area of law is Donoghue v Stevenson [1932] UKHL 100, in which the House of Lords established the modern test for determining whether a duty of care exists in negligence cases. This case has been described as "one of the most famous cases in the history of the common law" (David Ibbetson, A Historical Introduction to the Law of Obligations, Oxford University Press, 2015, p. 67)
The law of negligence has continued to evolve and develop through judicial decisions in subsequent cases, such as Caparo Industries plc v Dickman [1990] 2 AC 605, which established the three-part test for determining whether a duty of care exists, and Bolam v Friern Hospital Management Committee [1957] 1 WLR 582, which established the test for determining whether a medical professional has breached their duty of care by failing to take reasonable care.These examples demonstrate how the common law can work in practice to develop and refine legal principles through judicial decisions, and how these decisions can have significant and far-reaching implications for the legal system as a whole.
In conclusion, the English Legal System is based on the principles of common law, which is a legal system developed through judicial decisions rather than through legislative enactment. Common law is a flexible and adaptable system, capable of responding to changing social and economic circumstances. It is in contrast to civil law systems, which are based on codified laws and statutes created by legislative bodies. The development of common law in England can be traced back to the Norman Conquest of 1066, and there are many examples of common law principles in practice in the English Legal System today.

References:

Glanville Williams, Learning the Law (16th edn, Sweet & Maxwell 2002)

Holland, Jurisprudence (5th edn, Sweet & Maxwell 1997)

McLeod and Doolan, An Introduction to English Legal History (4th edn, Butterworths 1993)

Lord Denning, The Discipline of Law (Butterworths 1979)
David Ibbetson, A Historical Introduction to the Law of Obligations (Oxford University Press, 2015).
 Henry Merryman, Rogelio Pérez-Perdomo, The Civil Law Tradition: An Introduction to the Legal Systems of Europe and Latin America, 3rd ed. (Stanford University Press, 2007).