This morning I nervously went to Argos to swap my faulty exercise bike. I had already decided that I need to pay a bit extra and get a better model - one where the resistance is not provided by a belt.
After an hour assembling the thing I needed a rest ... and a large coffee (Starbuck's Sulawesi - wonderful).
Early this afternoon I had a 30 min spin. The difference between magnetic and belt is amazing - this feels much better.