With the Scottish Parliament elections approaching, the Unit gathered together three experts to discuss the prospect of Boris Johnson seeking to block a second Scottish independence referendum, and how the Scottish government might respond to such efforts. Charlotte Kincaid summarises the contributions.

With the May 2021 Scottish Parliament elections approaching, and the recent attention on the continuing political conflict between First Minister Nicola Sturgeon and her predecessor Alex Salmond, eyes are very much on Scotland and the prospect of a second independence referendum (‘Indyref2’). Boris Johnson has said he would refuse a referendum, but is this possible, and what would be the ramifications? To explore the possibility of Indyref2 and how such a referendum would be brought about, the Constitution Unit hosted a webinar with three experts: Professor Aileen McHarg of Durham Law School; James Forsyth, political editor of The Spectator magazine; and Dr Alan Renwick, Deputy Director of the Constitution Unit. The summaries below are presented in order of the speakers’ contributions.

Professor Aileen McHarg

Professor McHarg explored a number of pathways to a referendum from a legal perspective. She first addressed if the UK government can prevent a second Scottish independence referendum: it can, and it isn’t required to agree to a Section 30 order, or amendments to the Scotland Act to enable Holyrood to legislate for a second referendum – as was the case for the 2014 referendum.

But can the Scottish Parliament legislate for a referendum without a Section 30 order? This is less clear. The SNP has marked its intention to unilaterally introduce a referendum bill with or without a Section 30 order if it wins a majority in Holyrood following the May elections. If the bill passed, it would be subject to legal challenge. If the bill were judged as beyond the Scottish Parliament’s competence, any referendum which followed would not have a legal grounding, and in Aileen’s view, the idea of a referendum was ‘a non-starter’. She described talk of a wildcat referendum – such as that experienced in Catalonia in 2017 as ‘entirely misplaced’. There would be questions concerning the legitimacy of a unilaterally-called referendum, even if it were ruled lawful by the Supreme Court; unionists may be unwilling to engage in such a referendum.

Another possible pathway, although unlikely, is Westminster legislating to dissolve the Union. This is possible because a referendum on Scottish independence is not a legal requirement of independence.