Thank you for your response to my query. Sorry for the delay in getting back to you, I was away from base for a few days.
I brought the car back to the Main Dealer. they had it for 2 days and worked on the DPF. They also identified that air was getting into the fuel somehow.
I received the car back 9 days ago and was assured by the Service Manager that the problem was fully fixed and that I would have no more problems.
I have driven the car about 260 miles approx and am now back to Square One. Yesterday, I drove it at 2,000 revs for 25 miles as per the Main Dealers previous recommendation but it only got worse.
Is it possible that a Piston problem could create a DPF problem.
Any help is appreciated.
Thanks a mill...