Is P&T the only option? There are quite a few things I find off putting about the P&T, but it really seems the only sensible option for taking on buses. Tandems are solong and side by sides are presumably too wide to allow another pushchair to get on the bus? Or am I mistaken and there are other options? DS is a late walker and there will be a 23 mo gap, and I am not convinced I would do well with a sling. It would be great to have another pushchair to consider if anyone gets on well with theirs.