Another possible/optional unit for the British OOB (obat07) is the Avenger. It is already in winspww2: spob07/ Unit 138. The details for the Avenger in winspww2 are slightly inaccurate though. It did not have a bow machine gun, but it did have a .303 Bren AAMG instead.
The Avenger was developed during WW2, but was not delivered until 1946. It briefly equipped two SP artillery battalions in Germany after the war. They would have been used against the Soviets if the Cold War had turned hot. The Avenger was withdrawn from service in November 1950 because it was regarded as surplus to requirements.