Walbrook is a Ward of the City of London and a minor street in its vicinity. The ward is named after a river of the same name. The ward of Walbrook contains two of the City's most notable landmarks: the Bank of England and the Mansion House. The street runs between Cannon Street and Bank junction, though vehicular traffic can only access it via Bucklersbury, …Walbrook is a Ward of the City of London and a minor street in its vicinity. The ward is named after a river of the same name. The ward of Walbrook contains two of the City's most notable landmarks: the Bank of England and the Mansion House. The street runs between Cannon Street and Bank junction, though vehicular traffic can only access it via Bucklersbury, a nearby side-road off Queen Victoria Street.