you again the noise could also be the brushes arcing out, but if the bearings are gone, then it could be that causing that to!!
shame ya not closer otherwise id come stick a set of bearings init, but if ya brave have a go ya self, bearings are cheap as chips and u can call on me for some help!if u send it down i can do it,lol
if u book a call it will cost ya 110 quid ish, sounds a lot, but thats all included and coverd.
its a quality machine, its well worth getting fixed!