I have swaddled 2 week old DD for the first time tonight as we always have problems getting her off to sleep at this first stage of bedtime (no real problems after later feeds, just this time of night).
So tonight I've swaddled her in a cellular blanket. Her room is 20 degrees at the moment and she is wearing a short sleeved bodysuit and a babygrow.
Does that sound about right? She'll go into her sleeping bag after the next feed at 10/11pm or whenever she wakes.