I'm pregnant and we're trying to avoid buying a new car so I'm trying to get 3 car seats to fit in a Kia Ceed.
I'm looking for a narrow high back booster (ideally isofix) and a narrow seat for a heavy (21kg) 3 year old who I'd prefer to have a harness. We currently use a Britax 2-way Elite facing forwards for him as the harness can be used to 25kg (I can't trust him with an adult seat belt yet). We have a Cybex Aton for the new baby, which I'd prefer to stick with as we bought it with the Mamas and Papas Sola travel system and I don't really want to replace that. It looks relatively narrow anyway compared with other new ones I've seen.
Ultimately replacing all of them (and buggy) will be cheaper than a new car so I would consider it.
I'd really appreciate any advice. TIA.