In a speech at the SNP conference in Aberdeen, Grahame Smith of the STUC has apparently argued that the impact of the Trade Union bill currently before the UK Parliament is such that it requires legislative consent from Holyrood under the Sewel convention – ‘a consent that I am confident would not be forthcoming’, so in reality a veto on the bill at least for Scotland. The bill is unsurprisingly under heavy criticism not just from the STUC but also the Greens and Rise. The UK Government does not believe that the bill needs legislative consent, however (see Annex A of the Explanatory Note, available here; the bill itself is here as a PDF document).
Constitutionally speaking, it’s hard to disagree with the UK Government’s view. Industrial relations and trade union law, like employment law more generally, remains a reserved matter under Head H1 of the Scotland Act 1998, beyond the powers of the Scottish Parliament. The criteria for legislative consent under the Sewel convention are set out in Devolution Guidance Note 10 on Post – Devolution Primary Legislation affecting Scotland (available here as a PDF). Consent is not needed for bills which do not apply to Scotland at all; which apply to Scotland but ‘relate to’ reserved matters and do not alter Scots law on non-reserved matters; or which contain provisions applying to Scotland and relating to reserved matters, though they may make incidental or consequential changes to Scots law on non-reserved matters. Consent is only needed if the bill ‘contains provisions applying to Scotland and which are for devolved purposes, or which alter the legislative competence of the Parliament or the executive competence of the Scottish Ministers’.