The River Bourne is the name given to a Thames tributary in northwest Surrey, England which has a longer tributary, the Windle Brook, that rises nears Bagshot Park, a royal residence located near Bagshot, a village 11 mi south of Windsor and approximately 11 mi north west of Guildford, owned by who?
River Bourne, Addlestone: The River Bourne is the name given to a Thames tributary in northwest Surrey, England which has a longer tributary, the Windle Brook, that rises nears Bagshot Park in the south of Swinley Forest, Berkshire, merging with it while flowing through villages north of Woking; downstream the Bourne joins the Thames near Weybridge. Bagshot Park:  Owned by the Crown Estate it is the current home of Prince Edward, Earl of Wessex and the Countess of Wessex.
Crown Estate