new Scottish Labour leader used his first major policy speech today to argue it was a "moral imperative" that teenagers in their senior years are not left behind because of classroom closures during lockdown.The Glasgow MSP - who yesterday revealed he would challenge Nicola Sturgeon for her seat in May - said his party would put a "national recovery plan" at the heart of his election campaign.And he claimed "old arguments" about the timing of a possible referendum on Scottish independence would