Yes, it has, it's an 06 plate. For the first few years it did very little mileage as we live in a town with very good public transport (not in the UK).
For the last year it's mileage has been average, hence 45k on a 9 year old car. If you think the DPF may be clogged than perhaps I can take it out for a fast burn on the Autobahn to blow the soot out, my wife tends to stick around 60 -65 mph. We're showing 56mpg on the trip computer, we've had it up to 59 before.
Let me know what your thinking.