The SIC initiated the go-around maneuver as the PIC brought the flaps to the 5-degree setting, although the aircraft was not accelerating, followed by his retracting the landing gear. The SIC engaged the autopilot and quickly thereafter the “altitude capture” function, but failed to mention the action to the captain. The “Alt Cap” function pitched the aircraft based on the nearly 150-knot airspeed in place at the time of the go-around due to the winds. With the gear up, the AAIB report said the autoflight system pitched the 757’s nose up 22 degrees above the 19 the flight director was already commanding, creating a climb rate in excess of 6,000 fpm. The airspeed eventually dropped as low as 110 knots, although the stick shaker did not activate. At some point during these massive pitch and airspeed fluctuations, the captain took control of the aircraft and flew a visual pattern back to a safe landing at Bristol.