Scottish nationalists are shell-shocked after their leader did a bunk on Wednesday. And with good reason. Nicola Sturgeon left the SNP leaderless, directionless, failing on almost every policy front – from the NHS to bottle recycling – and with a legislative time bomb in the Gender Recognition Reform Bill, which is due to go off just as their new leader is installed at the end of March. It will probably destroy the Scottish coalition well before then. Indeed, the 18-month-old union with the Scottish Greens, another of Sturgeon’s personal initiatives, is unlikely to last the week. Attempts by pro-GRR Bill loyalists to keep the finance secretary, Kate Forbes, out of the leadership