So I've seen Phil &Ted smart lux online and I think it ticks all my boxes.
Rear facing
One handle
Sturdy wheels
for child up to 20 Kilos
It also has a built in carrycot. Which means in the unlikely event that DS1 cracks the shits I could carry baby and just turn the carrycot into a seat.
My big worry is that it looks like the seat has to be in seat mode and forward facing to fold. Is this likely to drive me crazy?
the closest place to see one is three hours drive away so I need to be kind sure.