The university bus services have changed a bit, you can find the full timetables by looking on the First or Wessex web sites.
The First U1 ( mostly purple buses ) , and Wessex U18 and U17( red and white buses) go from the Abbey to the Uni up and down Bathwick Hill.
They also go to Oldfield Park and Sainsbury. The U17 goes via Twerton and Southdown.
The U2 goes to Oldfield park, but goes via Pultney Road so does not go into the centre of Bath.
We understand they will all be double deckers, but hey should be much quieter and cleaner than he current buses.