Only the Series 1 VE had legacy timing chain issues from 2009 to early 2010. There I'll be visible evidence around the top front and sides of the engine casing but you would need to get down and dirty. There is no reason to question or prove that the work has been done! Especially if you are unfamilar with these engines. Replacing timing chains is a specialist job requiring precision alignment and testing. The work cannot be flunked or slapdash and the engine then passed as fit for service: it must be done correctly. However, their replacement in a later Series 2 VE raises questions, and a forensic look into the car's history would be worthwhile.