Complex sentence: In 1920 they began manufacturing motor vehicles at the Great Southern Works on the Bicester Road in Aylesbury under the name Cubitt, completing circa 3,000 motor vehicles between 1920 and 1925.
Split into simpler sentences: In 1920 they began manufacturing motor vehicles at the Great Southern Works on the Bicester Road in Aylesbury under the name Cubitt. They manufactured circa 3,000 motor vehicles between 1920 and 1925.