Hello It can be confusing as there are so many models on the market! For the first eight months I carried my baby in a sling and had my toddler in a stroller. I used a Phil And Teds Sport for a while but found it was just too big for my needs (I use public transport every day.) I then decided on the Phil And Teds Navigator as it seemed to be the most compact and narrow of all the P&T models. So, I didn't start using it until my baby was much older but I see on their website that it has 26 'riding options' including toddler with newborn. Just google Phil And Teds Navigator and click on Riding Options. I have no complaints about it. Very easy to get on and off buses and trains. Expensive though! I got mine second hand from Gumtree. Good luck!