Delegated legislation in the pandemic: further limits of a constitutional bargain revealed

Abstract The challenge that delegated legislation poses to parliamentary sovereignty and associated supremacy in the UK is purportedly addressed through what we term the ‘constitutional bargain of delegated law-making’. This has three elements: the proper limitation of delegation by Parliament through well-designed parent legislation; the exercise of self-restraint by the Executive in the use of delegated authority; and the enablement of meaningful scrutiny by Parliament. As a paradigm situation in which delegated law-making might be said to be necessary, the first year of the Covid-19 pandemic is an apposite context in which to assess the robustness of that bargain. Our analysis uses a sample of Westminster-generated pandemic-related secondary instruments as a peephole into the broader dynamics of this constitutional bargain and further reveals its significant frailties; frailties that are exposed, but not created, by the pandemic.