Boulton Paul SidestrandOverstrand  Well I looked at the Sidestrand article and didnt see it mentioned so  Also the Sidestrand seems a little early for such an apparatus perhaps the turret was intended for the Overstrand instead       Right you are although the turret technology was intended for the Sidestrand it was eventually fitted to the Overstrand You wont mind if I change the Defiant article subtly to correct the origins of the turret    January  UTC