Hi, I'm after some advice for someone who has a Citroen C1. My mum has this car, doesn't drive my DS often so no isofix and not going to buy one (drives him once in a blue moon). He's just growing out his newborn car seat and I'm looking for a stage 1 car seat for him for this car. It seems that the Britax Roamer 123 might fit, but not sure? Any advice, or experience? Thanks.