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.
Maudslay Motor Company
As well as cars the company made commercial vehicles with the first double decker bus produced in 1905 and a range of trucks varying from small two-cylinder models to six ton models. In 1912 Maudslay supplied a engine to power an early petrol-electric railcar.