Simplify the following text for a Grade 6 native English-speaking person.
Original: The company moved to a purpose built factory at Cheshunt in 1959 and since 1966 the company has occupied a modern factory and road test facility at Hethel , near Wymondham .
Simplified: In 1959 , the company moved to Cheshunt into a factory built to make cars . Since 1966 the company has been in a modern factory and road test facility at Hethel , near Wymondham .