To appreciate the importance of the Brexit referendum, we must consider the series of constitutional issues that it raises

The Brexit referendum, set to take place in June, has created open divisions in the Conservative Party, with many questioning the sustainability of two warring tribes within the same one-party government. Here, Andrew Blick argues that in order to understand the constitutional significance of the referendum, we must move beyond the politics of the situation, and assess the concept of the supremacy of the Westminster Parliament; the nature of referendums as political decision-making devices; the collective responsibility of Cabinet; and the possibility of a break-up in the UK.