Sleeping bag questions Hi, I have a couple of sleeping bag-related questions. I am in East Anglia in England and winter doesn't get below -3 or -4 degrees. I have been taking the "comfort temperature" ratings with a grain of salt. last year I camped in a super cheap mountain warehouse sleeping bag at -1 and was freezing, even in ANOTHER sleeping bag, full tracksuit, and 2 blankets.I am currently looking at the Rab Alpine 600 as my top choice. Do you think I will be warm enough in this bag (also with a good sleep mat) if I am wearing thermal clothes, at between 5 and -5 degrees? There are a couple of mountain equipment and therm-a-rest bags that are on my radar too but the Rab one is my current best contender.Any help is hugely appreciated because I really don't want to have to buy more than one. Thanks.