A project for a 3.75 inch (95 mm) howitzer was started in 1942. Two guns were made, and one of these was chosen for test mounting on a Harry Hopkins tank chassis. Like the Harry Hopkins, the Alecto had skid steering, which operated by bowing the tracks through lateral movements of the central road wheels. The gun was mounted in an open topped structure facing to the rear. The first trials were not started until late in 1944. The trials uncovered various problems but by the time these were solved the war in Europe was over. With no prospect for use in the Far East, the project was ended.