I will check - all seats are Britax.
They only do one reaql model infant carrier and the isofix works well.
http://www.britax.co.uk/car-seats/car-s ... lus-shr-ii
I think the group 2 is a britax robbie?
Don't get a multi grade seat (Evolva type) - group 1's are massive (and heavy).
The group 1 is a duo plus.
The eldest sits in the middle as he can climb over the isofix base ok. The base has a support leg so it doesn't touch the seat cushion.
It's tight in that all seats are touching and the baby carrier has to be levered and ricked in but it's definately safe. The seats don't touch the doors at all.
Long term, I see us getting a multimac (
http://www.multimac.co.uk/home). Yes, very expensive but cheaper than changing cars and will last ages and will fit in the Mini so swimbo can get all kids safely in.