We have just gone back to using a grow bag now the weather's a bit cooler. 1 tog over a sleep suit in 23-24° room. Just ordered her 6-18 month ones for when she moves into her cot (as cant seem to keep blankets on her in there) and they're enormous. Not sure when she'll be able to go into them as she's quite a way below the 18lb min weight, but is close to the 27" max length on the 0-6, so hopefully she won't grow much longer over the next couple of months so she can stay in them a bit longer. We've gone for one each of 1 and 2.5 tog for now and might ask for some more at Christmas as they're quite pricey (although we did buy these in the sale).
Congrats on the house offer Bex.