SurreyJohn, thanks for your reply,
Higher revs at start up would explain why the car doesn't slow down as expected in traffic.
I've just bought this car to replace Yeti diesel as people say diesels are not good for short start stop journeys and they're right as constant active regens were getting to be a pain.
To read that these cars are not suitable for this driving either is a bugger. How many people do any other type of driving, especially in a city where most journeys are short stop start and idling in traffic.
That leaves the choice of earlier euro 5 without PPF or hybrid, full EV.
Only just bought this so time will tell if this is, as you say, less problematic as a DPF.
Hey ho