Yes, it is possible to store the luggage at the railway station in boxes, but the station is not manned and you have to pay tickets on the machine if you havent done it on the internet. It is a lot of cafes, restaurants, pubs and a shopping center close to the hotel he stayed at. A lot of people to go for a walk along the harbour or in town. One of the worlds strongest tidal currents is a short busride from town.
The local museum closed 3 o clock so he wouldnt have much time to go there . The art gallery is closed until wedensday, but the aviation museum is open until 18.00. The library have got several architecture prizes and they provide wifi for free, most of the cafes, pubs and restaurants too.. It is possible to go to an island for a short trip, but it would be difficult to reach back in time before the night train leaves.