I've got one of the Vango Nitestar 300 XL Sq. The photo shows the face closed to it's smallest position but you don't need to have it closed to this extent. On the subject of warmth, this can be subjective but by comparing the Comfort Limit and Extreme values of sleeping bags you can get an idea how individual bags perform.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.