Martin O'Neill, the 74-year-old Celtic manager, has agreed to stay at Parkhead on a one-year deal with option for a further year after delivering a Premiership and Scottish Cup double. The experienced boss secured the league title on the final day with a 3-1 victory over Hearts, followed by another 3-1 win over Dunfermline Athletic in the Scottish Cup final.

Twenty years after ending his first five-year tenure, O'Neill returned to Celtic in late October on a temporary basis following Brendan Rodgers' departure. He made way for Wilfred Nancy but the Frenchman's six defeats in eight matches prompted O'Neill's return in early January, where he completed an improbable season turnaround for the Scottish giants.

O'Neill's ninth trophy as Celtic manager comes after a turbulent season that saw the club change managers three times. The experienced tactician's short-term solution has now become a longer commitment, providing stability to a club that needed steady leadership after Rodgers' departure and Nancy's failed appointment.