Hi girls I really like the idea of baby sleeping bags. It seems that the ideal nursery temperature is 16-20c, so I was thinking of getting a 2.5 tog one in 0-6 months - bubs is due in July so for July/August it'll be too warm for that, but by the time we hit September knowing the British weather, a 2.5tog one should be fine?? And then another 2.5 tog one for 6-18 months - will prob have to buy a lighter one for the summer but not going to buy that far in advance!! Was just wondering whether this sounds about right???