Do I need anything else replaced when a cam belt is changed?

I have a 2009 Renault Clio, which has done 3500 miles. According to Renault, it needs a new cam belt. They recommend that the tensioner and the water pump should be replaced, but nothing else needs done. Is this correct, or should I pay extra to have the belt replaced as well?
Needs timing belt, tensioner, waterpump and alternator belt replacing. No point in just replacing the belt because if any of the other three fail they will take the belt off and the engine will suffer the same damage as if the belt failed.
Answered by Honest John on

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