I'm doing a long haul flight in the summer and need a stroller that can be taken on as hand luggage as when we arrive it will be in the middle of the night and we'll have a newborn, 2 yr old and 5 yr old! Newborn (2 months) will be in a sling, but toddler will need the stroller. To complicate things once I'm there I will want to use the stroller for the newborn as it'll be too hot to have them in a sling, but want the option of being handsfree when the baby is sleeping so I'm free to interact with the other two! I'm looking at the Mountain Buggy Nano but have read the carrycot really only lasts till their 2 months. My babies tend to be tall, so it might be useless...not sure what you're meant to then do as the other seat doesn't seem to be ok until they're 6 months.
Perhaps there's another stroller someone can recommend? It would be bonus if it would also fit a car seat, but that's not a deal breaker.
Many thanks!