For 3-axle, longitudinal-engine Dennis Trident built for export, see Dennis Trident 3/Dennis Trident E500.The Dennis Trident 2 is a 2-axle low-floor double-decker bus chassis originally manufactured by Dennis, which was unveiled in 1997 and replaced the Dennis Arrow. It was built by TransBus after Dennis was incorporated into the group in 2001 (the Dennis brand name was once dropped).