Not something you'd really want to do unless you absolutely HAD to. I don't know practicalities of how near the campus is to the train station etc, but even so it will be very difficult having a long commute like that at either end of the day, especially with early starts and unpredictable finishes. There may also be long gaps in the middle of the day - where will you go then? And of course, when you get to clinical school you will be on placements in all sorts of places, not just Brighton itself.