I have returned a few days ago from Plymouth where I work from time to time. I stayed in the lovely Casa Mia B&B which lies close to the city centre, the Barbican (bars, restaurants and yacht harbour) and the coach terminal, and 15 min walk to either the continental ferry terminal or the train station. I have immediately made reservation for my next visit in summer because Casa Mia is the perfect accommodation, with its very nice owner (who even speaks Welch) and employee, clean and quiet rooms, wifi, and last but not least an excellent breakfast. I highly recommend this place.