After the Waren House was extensively restored by Ivor Cunningham Architects, Schoenaich Rees developed a management plan for the grounds. This Edwardian mansion in Surrey was built for Princess Charlotte. In the late 19th century the grounds were the home of the Veitch Nursery and many rare and mature specimens are to be found within the gardens and in the adjacent Japanese Garden. It was later used as ICI's International Conference Centre.

Schoenaich Rees were garden advisors for a period of seven years during which time their designs for the walled garden and the grotto were implemented. Additional designs for seasonal planting were put in place with plants that were contract grown. Patterns were designed in a naturalistic style with images and colour themes changing throughout the growing season.