Originally Posted by
Scots_Al
But I do agree with Coldwalker, 15-20 would be better still!
whilst its delightful to be agreed with, I think you will find I said -15C to -20C! Cold enough to see the fairy dust when you wake up (if you've never camped out in significantly sub-zero temperatures you have missed the magical delight that is Fairy Dust

). But I am odd that way!