Here's the Andover blurb directly from the Pilot's Notes:
4. Short Landing
Note: STOL techniques may be used only as ordered by the Operating Authority.
(a) Technique:
(i) After the pre-landing checks have been completed (Prop Brake to Rev Idle) reduce speed to below 120 knots and select 27° flap.
(ii) Aim to be lined up with the touchdown area with 30° flap selected at VAT plus 15 knots.
(iii) When lined up, continue the approach reducing speed to cross the touchdown point at VAT. It is important that the speed is maintained at not less than the scheduled VAT otherwise the ability to round out will be impaired.
(iv) When near the ground, close the throttles and round-out to fly level, with the wheels just clear of the surface. Select reverse thrust in order to touchdown. Should the aircraft balloon, do not select reverse thrust until re-established close to the ground.
(v) Reverse thrust is usually selected at completion of round-out, but in some circumstances it may be required slightly earlier. The exact point at which to select reverse can only be determined by practice. Note that if selection is made too early a heavy landing will result.
(vi) After touchdown, lower the nosewheel, apply maximum braking and keep straight with nosewheel steering. Reverse thrust should be cancelled when the speed reaches 30 knots, or earlier if forward airflow past the propellers is detected.