The question of Scottish independence is not going away

Scotland's first minister, Nicola Sturgeon, holds a press conference in response to the supreme court’s ruling against a second vote on independence. Photograph: Andy Buchanan/AFP/Getty

Martin Kettle overstates the difficulties in using the next general election as a de facto Scottish independence referendum (Opinion, 23 November). While such an election is “a wide-ranging exercise in choosing a government” in England, most aspects of Scottish home affairs are devolved, leaving the electorate clear to register their views. The Scottish Greens are pro-independence too, so a majority of SNP/Green votes will be a majority for independence whether other parties “play” or not.
Mark McKergow
Edinburgh

• I have two questions in response to Martin Kettle’s article. First, is the UK a voluntary union of nations? Second, if it is, how does one of the participant nations leave if it wishes?
Donald MacKay
Crossford, Fife

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