The 2005 First Bus handbook was published in May 2005. Up to 2005 new low floor buses carried a different livery from older vehicles. At the start of 2005 this was changed with a standard corporate livery now being applied to all vehicles. First continues to lead the industry with its commitment to the environment through the use of environmentally friendly fuels. First is actively involved in trials of alternative fuels with initiatives such as gas buses and hybrid engines and is committed to running all of its buses on ultra-low sulphur diesel.