Meantime, Storp's group arrived, commencing their attack at 14:38. As planned, they had flown across the borders before heading northwards south of Roslin and over Threipmuir Reservoir in the Pentland Hills almost due south of the target area and the airfield at Turnhouse. Yellow Section of 603 Squadron (led by Flight Lieutenant George Denholm) had taken off at 14:35 and were climbing to altitude to intercept. Storp descended to and decided to attack the ships beside the bridge. As the Ju 88 dived, he selected one of the cruisers as his target and at released his bombs. He believed his target was Southampton.