Complex sentence: Hammer originally rented country houses in which to film, until the company eventually purchased Down Place on the banks of the Thames near Bray--after using every room and angle in its films, it later enlarged the house into the Bray Studios of today.
Split into simpler sentences: Hammer originally rented country houses in which to film, until the company eventually purchased Down Place on the banks of the Thames near Bray. After using every room and angle in its films, it later enlarged the house into the Bray Studios of today.