The Supreme Court's Miller Case judgment outlined the background to the introduction of the Sewel Convention:
The convention takes its name from Lord Sewel, the Minister of State in the Scotland Office in the House of Lords who was responsible for the progress of the Scotland Bill in 1998.In a debate in the House of Lords on the clause which is now section 28 of the Scotland Act 1998, he stated in July 1998 that, while the devolution of legislative competence did not affect the ability of the UK Parliament to legislate for Scotland, “we would expect a convention to be established that Westminster would not normally legislate with regard to devolved matters in Scotland without the consent of the Scottish Parliament”
The Supreme Court. (2017, January 24). JUDGMENT R...