What condition did Belgium impose when adopting the Fox and the Firefly?

The Belgian Air Force was looking for a light bomber to replace its Breguet 19s and had already bought Fairey Firefly II fighters from Fairey, which had created a Belgian subsidiary, Avions Fairey, to build them; the Fox IIM, rejected by the RAF, was demonstrated to it in that context. The initial contract stipulated that every additional order be produced in Belgium. In the case of the Firefly, the agreement provided for 12 aircraft built in the United Kingdom followed by another 33 manufactured in Belgium.

Tips moved to Belgium to set up the subsidiary and established it near Charleroi. He acquired land at Gosselies, where he installed the plant of the newly created Société Anonyme des Avions Fairey S.G.D.A., ready to produce the Fairey Fox as early as 1932. Avions Fairey was the Belgian subsidiary of the British Fairey Aviation and built aircraft for the Belgian government. Of the Fox II, 12 units came from Fairey in Great Britain and another 31 were built under licence at Gosselies.

Avions Fairey received new orders for Fireflies and, later, for Fairey Foxes, which would be the main aircraft of the Belgian Air Force. On 10 May 1940 the factory was heavily bombed by the Germans.