Found out the Hospital Hopper is free to DMU students. It's an hour long bus that goes from Tesco to Tesco, with the four hospitals, the train station, and a stop near my halls in the middle. Express limited stop. Smells like a hospital but it's a very nice bus.
Got it in the wrong direction, ended up at the wrong Tesco, so I had a cup of tea and a cake and then got it back to the other tesco, where I had a cup of tea and a scone, and then got it back to my halls.