I was told, years ago, that when Westlands were going to build the turbine engined S58 they proposed putting the engines and gearbox together in the same way as the Westminster and the cockpit would go where the engine was. It was rejected by the Services as they considered it was too dangerous to have the engines above the cabin in case of a crash. Donno how true it was, but that was what I was told. Shades of the twin Gnome Belverdere, wide and fat with two aft engines like the wokka.