Erosion of UK Parliamentary Sovereignty through EU Membership

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‘The UK’s membership in the European Union has fundamentally altered UK constitutional law by eroding Parliamentary sovereignty.’ Discuss.
In the 19th century, A. V. Dicey, wrote of the twin pillars of the British constitution. These pillars are the principle of Parliamentary sovereignty and the rule of law. Parliamentary sovereignty means that Parliament is the supreme law-making body: the Acts passed are the highest source of English law. Following the UK’s membership of the European Economic Community in 1972, the UK not only became bound by the laws of the EU, but also the supremacy of European Union law. The contention between the dominance of EU law over parliamentary supremacy is ascertained in Thoburn v Sunderland City Council which …show more content…

Under the terms of the 1972 Act it has always been clear that it was the duty of a United Kingdom court, when delivering final judgment, to override any rule of national law found to be in conflict with any directly enforceable rule of Community law.’ [R v Secretary of State for Transport, ex parte Factortame (no. 2) 1 AC 603, 658-59 (per Lord Bridge)]. Therefore it can be said that the UK retains parliamentary sovereignty in the sense that it can also leave the EU. However the UK voluntarily and knowingly entered the agreement and thus sacrificed parliamentary sovereignty which in turn restricts parliament’s legislative powers and so constitutional law in turn.
A key result of the principle of parliamentary sovereignty is that there is no hierarchy in regards to Acts of Parliament: all parliamentary legislation is, in principle, of equal validity and effectiveness. Yet, the judgement of Thoburn in 2002 indicated that there may be a special class of "constitutional statutes" such as the Human Rights Act 1998. This special class infers that parliamentary sovereignty has been eroded as despite the supposed equal validity of Acts, there are those which preside over them which in this case is EU …show more content…

In practice however the UK consents to British and European courts to review legislation to comply with international standards under the Human Rights Act 1998, and consents to follow EU law under the European Communities Act 1972. However, it has been stated that if Parliament were to expressly reject its treaty obligations the courts would be obliged to give effect to a corresponding statute, “If the time should come when our Parliament deliberately passes an Act – with the intention of repudiating the Treaty or any provision of it – or intentionally of acting inconsistently with it – and says so in express terms – then . . . it would be the duty of our courts to follow the statute of our Parliament.” Lord Denning, Macartys Ltd v Smith [1979] ICR at p. 789.[28] A key example of this to note is the Merchant Shipping Act 1998 which was inconsistent with EU law resulting in its

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