>>483571Word of warning. Sweating in a bag is not fun, and then you get too cold when you open the zipper.
I'd look for something with the comfort temp around -5 so you're cosy, but not overheating. Again, I prefer down.
Maybe this?
http://www.cotswoldoutdoor.com/rab-ignition-3-sleeping-bag-82410160?id_colour=6923Or if you do want a warmer bag:
http://www.cotswoldoutdoor.com/rab-ignition-4-sleeping-bag-82410162?id_colour=1022