HIGHLIGHTS FROM The Herald

• Sarwar says he would release secret Sturgeon files if he became First Minister READ
• Researchers in Glasgow discover new treatments for liver and bowel cancer READ
• At least 21 killed in head-on train collision in southern Spain READ
• HMRC responds to calls for personal allowance to increase from £12,750 to £20,000 READ
• UK travel company closes with all trips cancelled and no refunds - are you affected? READ