UK 30-year gilt yields hit 28-year high in global selloff ↧ ↧ UK 30-year gilt yields hit 28-year high in global selloff British 30-year bond yields rose to a 28-year high on Wednesday as a global bond selloff pushed ​equivalent US borrowing costs to their highest since 2002, adding to pressure ‌on finance minister John Healey before his first budget in three weeks' time.