A three-day pilots’ strike at Lufthansa subsidiary Discover resulted in further cancellations in Frankfurt and Munich on Sunday, the German holiday airline reported. Eight of 19 flights scheduled on Sunday were cancelled. Discover said it planned to use aircraft of other airlines or book passengers onto later flights. Ahead of the strike, which began at midnight on Friday (2300 GMT), Discover said it planned to maintain two thirds of its schedule. On Saturday, Discover said it had cancelled seven of 16 flights. The strike called by the Cockpit pilots’ union is to run up to one minute before mi…