In his book The Spirit of the Law Montesquieu describes a system where power is balanced between an executive, a legislature, and a judiciary. The balance is a complex one. In Montesquieu's thinking, the judiciary regulates the way in which the executive applies the law, which is created by the legislature. The judiciary would be limited by the legislature, as only the legislature would be empowered to create new law. The legislature could create law, but had no direct powers to apply it. In the UK, the role of the executive is largely assigned to the ministers of the Government, and perhaps to the civil service and the police. Parliament as a whole forms the legislature, while the role of the judiciary is taken by the courts and perhaps to a certain extent by tribunals.
Montesquieu's theories had a lot of influence, in particular in the growing USA. His model of separation of powers is still the one against which others are judged. However, although his model was said to be based on the English constitution, on looking closer it reveals that there are serious differences between Montesquieu's theory and political reality in the UK.
The Legislature and the Executive
The most striking is the dominance of the legislature by the executive. By long-standing tradition, the Government (executive) is formed by the leader of whichever party in the Commons can command a majority. As a result, the executive is able to exert considerable pressure over the legislature. This situation has been worsened by the rise of the party system in Parliament. While the Government is numerically only a small proportion of the total number of MPs, party loyalties encourage members of the Government's party to back it, even when they believe otherwise. So, although legislation is the responsibility of Parliament, in reality the legislative programme is driven by the Government in office. This is not objectionable, so long as there is careful inspection and control of the Government's legislative programme by the legislature. When the Government's party has a large majority in the Common there is almost no opportunity for Parliament to regulate the passage of legislation.
If the involvement of Parliament in the production of primary legislation has been rattled, it's involvement in secondary legislation is now almost non-existent. In practice, the exigencies of administration dictate that a certain amount of delegated legislation is required, simply because the time pressure on Parliament is so great. However, some delegated powers are extensive. Those of concern are the so-called `skeleton Acts', which contain no substantive law, but merely a set of powers to be exercised by ministers. There is also worrisome `Henry VIII' clauses in some Acts that grant powers to ministers to modify primary legislation. While these powers may improve the efficiency of the Parliamentary process, they strengthen the executive at the expense of the legislature.
This situation results from the fact that in the UK, although formally the purpose of general elections is to elect Parliamentary representatives, the party system means that in fact we are electing the Government. In some countries, elections are held separately for the legislature and the executive; in the UK, these roles are fused.
The situation isn't entirely hopeless. Government will not be able to introduce the legislation it desires in the form that it wishes. Governments are sometimes defeated by their own back-benchers, or by the House of Lords. However, where the Government really wants to introduce a fundamental piece of legislation, it can make it an issue of confidence. The threat that the Government may have to resign, and thus bring about a dissolution of Parliament, is usually enough to get even the most reluctant back-bencher to go with the majority.
The Lord Chancellor
There are further problems with the separation of powers between the executive and the judiciary, although these are less troublesome in practice than they could be. Surprisingly, the appointment of the judiciary is entirely in the hands of the executive. The head of the judiciary, the Lord Chancellor, is a Cabinet minister selected by the Prime Minister. The Lord Chancellor either appoints, or advises on the appointment of, all other judges (notionally the sovereign is responsible for the appointment of judges, but in practice this is a formality). However, senior judges, once appointed, cannot be removed from office at the whim of the executive - unlike the Lord Chancellor himself - so there is a measure of independence after appointment.
In fact, the office of Lord Chancellor is itself an inconsistent one, involving elements of judicial, executive, and legislative responsibility. There have been calls for the Lord Chancellor to remove his office from direct involvement in the selection of judges. Recently an independent appointments commission was set up to scrutinise the selection process, although it does not have any direct influence. The creation of a Select Committee on the Lord Chancellor's Department has opened up the Lord Chancellor's role to a higher level of Parliamentary scrutiny, and the current Lord Chancellor has let it be known that reform of his role is not entirely ruled out. So we may see changes here in the future.
The Executive and the Judiciary
The judiciary can, and does, hold the activities of the executive up to inspection, often by the process of judicial review. Where an Act of Parliament gives a minister or other administrator discretion, that discretion must be exercised according to law and in accordance with the principles of natural justice. The passage of the Human Rights Act has further strengthened the position of the judiciary. It provides the opportunity to quash an administrative action on human rights grounds, and may have added a test of `proportionality' to the grounds for judicial review (see, for example, R (Daly)
v Secretary of State for the Home Department (2001)). Often the involvement of the courts in the activities of ministers is seen as a hindrance by the Government. Occasionally legislation attempts to oust the jurisdiction of the courts to review the exercise of ministerial discretion. Even where this ousting is strongly worded and uncompromising, the courts have often been ingenious in finding ways to get around it adding their own interpretation.
Judiciary and Parliament
Finally, I am going to look at the separation of powers between the judiciary and Parliament. In reality we have more of a sharing of powers than a separation. Montesquieu believed that judges should not be legislators, but there is now little doubt that in our common-law system the judges do have a legislative role. The judges themselves are not keen to admit to this, and often go out of their way to disguise it. However, while there judges who refute the idea that judges create law, increasingly the senior judiciary are coming clean about it. Although they may not always create the law, different judges will interpret and apply the law in different way. The fact that judges may have what is essentially a legislative role is discomforting, since we have grown used to the idea that the legislature is a body of our elected representatives, for all its faults. This makes people uneasy because we don’t actually appoint judges; the Lord Chancellor does this, who is appointed by the Prime Minister in which we have voted for. The judges are not only not elected, coming from a narrow social and political band they are not even representative. We find the same judges in the panel; ‘Cambridge Law students, upper class white males’. Law lord, put something in about female law lord here!!!
Despite the overlap between the judiciary and Parliament in legislation, the order of precedence is clear. It is generally accepted that the courts are not empowered to rule on the validity of Acts of Parliament. Interestingly, the balance of power may have shifted somewhat with our increased obligations to Europe. From early 1990 to the present day we have seen that the courts could disregard even primary legislation where it was in conflict with our treaty obligations to Europe as defined by the European Communities Act (1972). Likewise, the Human Rights Act has given courts the power to issue a declaration that primary legislation is incompatible with the European Convention on Human Rights.
So, we can see that there are tensions between the goals, motives, and procedures of the executive, legislature, and judicial arms of government, and this is all to the good.
In Conclusion
Separation of powers requires that these bodies remain in a state of dynamic interplay, with no one body being able to dominate the others. At the same time, there are places where the powers that Montesquieu thought should be separated are, in fact, fused. All three of the arms of government exercise functions that in a strict separation of powers should really reside elsewhere. The executive exercises legislative powers by dominating Parliament. It exercises judicial responsibilities whenever an administrator exercises discretion to decide in favour of, say, one planning application rather than another. The judiciary creates law, subtly, and with circumspection. Who is to say that they are not bias being of certain race, class and social backgrounds. Parliament is able to discipline and hold to account its members, without the involvement of the courts. And so on.
It should be clear that our system of government is a long way from Montesquieu's ideal. What is most surprising, however, is that it works as well as it does. Ultimately, I believe, it is the acceptance of constitutional conventions that keeps our country going. The Government could, for example, further dominate Parliament but, on the whole, it does not. Parliament could legally enact legislation that transfers the power to decide disputes away from the courts and more to administrators, but it does not. Judges could make radical changes to the law rather than incremental ones but, on the whole, they don't. And so on. The UK doesn’t have a written constitution that sets out the balance and separation of powers so, ultimately, it is convention that controls these things. And convention works because everyone wants tomorrow to be the same as today.