1946 A. C. Cossor formed a new subsidiary Cossor Radar Ltd.[1]
1945 Secondary radar for air traffic control became a key area of development for Cossor.
1947 The chairman claimed the company was the only one anywhere in the world to concentrate on developing civilian radar[2]
1948 Radar Control at Douglas Harbour, I.O.M.
Presumably later Cossor Radar and Electronics