Original sentence: On 25th April 2009, Metrobus gained the contract of route 75 at their Croydon garage using Dennis Trident 2 / Alexander ALX400 on loan from Selkent because the Scania N230UD / Optare Olympus haven't arrived yet
Edited sentence: On 25th April 2009, Metrobus using Scania N230UD / Optare Olympus