Dennis Trident 2 (marketed as Dennis Trident, but once known as TransBus Trident 2/TransBus Trident) is a 2-axle low-floor double-decker bus chassis originally built by Dennis in the United Kingdom, 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). From 2004, it was built by Alexander Dennis. The new version of Trident 2 chassis was also available with Darwen/Optare Olympus bodywork, the first example was delivered to CT Plus of London in 2008.