The rule of law and a separation of powers are constitutional principles, which seek to impose limits on the exercise of governmental power. How effective are they as a means of constitutional control in the United Kingdom?

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The rule of law and a separation of powers are constitutional principles, which seek to impose limits on the exercise of governmental power. How effective are they as a means of constitutional control in the United Kingdom?

In order to answer this question I will break it down and deal with each topic separately starting with the Rule of Law. I will then move on to the separation of powers and finally I will discuss the relationship between the two principles and their effectiveness as a means of constitutional control in the United Kingdom.

The rule of law is one of the doctrines at the heart of the constitution of the UK and has it roots in theories developed in the Middle Ages. It is concerned with the allocation of power and the control of the bodies that exercise it. Aristotle stated that 'the rule of law is preferable to the rule of any individual'. This sentiment appears to form the platform on which the modern concept of the rule of law is based. However the rule of law means different things to different people and at this stage it will be helpful to look at some of the definitions that have been put forward by our more influential writers.

Dicey divided the doctrine of the Rule of Law into three concepts. Firstly: No man is punishable or can be made to suffer in body or goods except for a distinct breach of law established in the ordinary courts of the land. In this sense, the rule of law is contrasted with every system of government based on the exercise by persons in authority of wide, arbitrary, or discretionary powers of constraint.

Whilst the idea that government should be constrained in its ability to make arbitrary or secret laws is on the face of things a noble one, in that a citizen cannot be expected to comply with the law if he is unable to ascertain what the law is. The idea that the executive should not have arbitrary powers is in today's society unworkable e.g. Are we to expect every police officer to report every transgression of the law? (The workload placed on the crown prosecution service would surely cause it to grind to a halt) Or are we to make civil servants in welfare offices stick rigidly to cast iron rules when dealing with cases of hardship, unable to take individual circumstances into account when making a decision? (This would undoubtedly lead to unnecessary suffering in many deserving cases). In many cases the bodies that are given arbitrary power have grievance procedures in place to protect citizens that are affected by them. Thereby limiting the likelihood of individual civil servants abusing their powers.
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Secondly: No man is above the law; every man and woman, whatever be his or her rank or condition is subject to the ordinary law of the realm and amenable to the jurisdiction of the ordinary tribunals.

Again it appears that Dicey has too narrower perspective on this issue. It can be plainly seen that for society to function smoothly certain sections of the community must be allowed limited immunity from the ordinary law. E.g. the emergency services need immunity from certain road traffic legislation in order to save life and limb. Members of Parliament are granted ...

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