DD will be 23 months when DC2 is born. Ideally I'd like a double that holds a pushchair seat for DD1 and a car seat and carrycot for newborn. Ideally toddler facing the world & newbie facing me. Doesn't necessarily need to convert to a single as I currently have a single that can be used for DC2 when DD1 starts walking properly. I also have a Corsa (which has a surprisingly roomy boot for such a small car). I would also like to fit through doorways. Do I basically need to invent this or does anyone have a suggestion?