In the summer of 1955 I was on temporary detachment to Northolt and wandering around the station getting my bearings was astonished to see a hangar full of Gannets in various stages of assembly being assembled by civilian workers. ISTR output was one Gannet a week, but am not 100% sure of how many.
Curious, I was told the aircraft being assembled at Northolt had been built at Fairy's Hayes factory, transferred by road to Northolt for assembly, and finally flown to White Waltham for collection by the Navy.