Thanks for the feedback, Phil. The drum turns without difficulty, wobble or noise so I have no reason to think the bearings have gone. The motor seems rigid to the drum (both moving on the tension springs together, of course). I'm wondering if the belt has gone slack; even though it LOOKS ok, maybe it has stretched? Unfortunately, there seems to be no ability to adjust the tension so I'd have to buy a new belt without really knowing if it will fix the problem.
Unfortunately, I am nearly two hundred miles from Leeds so not a viable customer for you! If you have ANYthing further to add, I'd much appreciate hearing your thoughts.
Douglas, August 2007