Double-decker bus
The first commercial horse-drawn double-decker omnibuses were introduced in England in 1847 by Adams & Co. of Fairfield, Bow, then improved upon by John Greenwood, who introduced a new double-decker in 1852.
Dennis Falcon
The Dennis Falcon was a rear-engined single-decker bus, double-decker bus and coach chassis manufactured by Dennis between 1981 and 1993. It was mostly built as a single-decker bus, although some express coaches and a small number of double-decker buses were also produced. The total number built was 139, plus one development chassis.