Ok - so my DC25 is about 10 days out of warranty - typical!
Had some suction issues - which i have resolve with a good clean (brush) of the cyclone.
However - just now, the ball started making a clicking noise, as if it was catching on something... then ceased up. If i lay the machine down (do there is no downward pressure) it spins freely.
I can't see anything obvious, so i am guessing it is likely a bearing / axel joint. Cant find anything online though...
It may be time to trade up and get a new one... but trying to eek the last life out of this trusty sucker first!