Complex sentence: On 3 October 2009, East Thames Buses was taken over by Go-Ahead London, route 185 is now operated by Go-Ahead London, the existing buses are used and has gained a 5 year contract.
Split into simpler sentences: On 3 October 2009, East Thames Buses was taken over by Go-Ahead London. Route 185 is now operated by Go-Ahead London, using former East Thames buses having gained a 5 year contract.