The Sewel Convention – which applies when the UK Parliament wants to legislate on a matter within the devolved competence of the Scottish Parliament, National Assembly for Wales or Northern Ireland Assembly, dictates tbat the UK Parliament will “not normally” do so without the relevant devolved institution having passed a legislative consent motion – will be strengthened with a memorandum outlining how HM Government and Devolved Government will work together in the common-good interests of the United Kingdom and its componet parts.