They were at the start of term, but they've since installed CCTV and a light at the top of the steps and i've not heard of any incidences for a long time. I don't feel particularly unsafe, but then I don't do anything silly like walking home at night alone.
You should be fine as long as you just be sensible.
Plus, they have a security car which i often see going round the grounds - makes you feel a bit safer.