Hi Darren...welcome to the Club
As Greydog has already mentioned, it sounds like the EGR or DPF (or both) are clogged as the car is very low mileage for the year, suggesting that it has been smoked around town locally and needs cleaning out.
I would advise contacting someone like Terraclean who can sort that out for you.
Let us know how you get on with it
Cheers Trevor