Hotpoint CTD00 Tumble dryer drum wont turn?

Hi,
this week my appliance above stopped working, the pump and motor seem to fire up but the drum will not turn...is this a belt / drive issue as has been offered by a few pals? or am I into a big bill from an expert...if this is a fairly easy thing to check for or even do myself I am well up for having a go as I am fairly handy just need a bit of guidence...thanks...Keith