I use alpro yoghurt, buy a large carton which varies between £1-1.50 and add fruit to it, I normally use a quarter carton and the rest stores well for a few days. It's about 2.9g of sugar
I was told to eat oatmeal bread by dietitian and I can't get it in tesco, asda or sainsbury: only get co-op oatmeal bread which means I have to get on a bus or in car to go to nearest co-op.