I couldn’t believe it when Nicola Sturgeon called for the resignation of Alistair Carmichael, the former Scottish Secretary, over his role in the leaked memo affair.

As readers will recall, the Daily Telegraph published a confidential document during the election campaign that purported to be an account of a conversation between Sturgeon and Sylvie Bermann, the French ambassador, in which Sturgeon said she’d prefer David Cameron to Ed Miliband as Prime Minister.