The Bourn Brook From the Bourn Brook comes the name Bournville, 'ville' being added at a time when it was fashionable to consider all confectionery to be French. In the early dats of the business it was referred to as the Bournbrook Trout Stream. Now this quiet backwater of the factory attracts ducks and other species of water fowl. Water from the pool is filtered and used for secondary cooling systems within the factory production areas and power plant. For many years a large site dominated the setting - a storage for the product known as 'crumb' which is milk chocolate at an early stage of manufacture. From this point it was possible to view Cadbury's railway which until the 1960's operated on over five miles of track within the factory site.