The polls have consistently shown Humza Yousaf in third place, distantly behind both Kate Forbes and Ash Regan, on net approval ratings. They've also consistently shown him in second place, behind Ms Forbes but ahead of Ms Regan, on positive preferences for SNP leader. Literally the only sense in which he's ever been "ahead" is in the betting odds - which of course are based on assumptions and guesswork about how the vote is likely to go, rather than on any objective measure of popularity. At one point Mr Yousaf was an extremely strong favourite because it was assumed the SNP would never elect a leader with Ms Forbes' strong religious views. As the polls have started to challenge that assumption, Ms Forbes' odds have gradually shortened again, and now she looks close to returning to her previous position as outright favourite. Here are the latest prices from the largest betting market...