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As documented by the Independent Commission on Referendums, the usage of referendums in British politics has increased, yet they can conflict with conventional parliamentary sovereignty.
Throughout a lengthy period, (perhaps ironically) arguments for referendums on subjects involving EU powers were advanced on the grounds of defending this same sovereignty.
The 2016 EU referendum – which David Cameron eventually conceded under pressure from Conservative Euroskeptics and UKIP – was highly exceptional in two significant aspects.
First, it was what the House of Commons Public Administration and Constitutional Affairs Committee (chaired by prominent Brexit supporter Bernard Jenkin) criticized as a ‘bluff-call’ referendum, in which the government’s intention was not to seek approval for a change that it supported, but rather to thwart its opponents’ demands.
Second, the referendum was conducted on the basis of a broad proposition (to leave the EU) rather than a specific prospectus.
So, when the outcome was not what the Prime Minister or the majority of MPs (even on the Tory benches at the time) desired, it was up to the legislature to determine how to implement it.
In such conditions, tensions between legislative and popular sovereignty were manifest.