I went to an open day last year, the illustration students work outside of the main art design department most of the time, in the city centre. The building's really nice, very modern. The illustration students share a floor with the graphic design students, in a couple of big shared spaces. In third year the students get their own little rooms shared with another student off the main room to keep their own work in, which I really liked. Standard of some of the work was really good.
Best to go have a look really, Bristol's got everything you could want as a student, the UWE halls aren't bad, except the main student village is a trek from the art design campus, but there are nearer halls in the city centre.