ian16th,
It was all Dowty Rotol then. Dowty Propellors are on the industrial site that lies on the perimeter of Staverton airfield, and part of GE Aerospace. The much larger factory site down the road and on the opposite side of the road to the airfield, the old Dowty Rotol main site, is now the Messier Buggati Dowty undercarriage factory.