Thanks for help everyone: Here is what i discovered so far.
New EGR all throttle body and intake at EGR cleaned.
Ran ECU scan it had a boost sensor error, cleared the error but still coughing,stuttering at light throttle.
Checked DPF (as I was going to drill it anyway) the back 1/3 had collapsed with some rattling around in the rear muffler. (Probabaly why my turbo had to be replaced 1 month ago??) Drilled holes into next 1/3 of DPF cleaned out DPF and rear muffler. Then also added a blanking plate at egr. definate improvement with blanking plate but still that light throttle cough,stutter, like turbo wastegate but sure I dont have one. Checked pipes at turbo boost solenoid all good.
Will a regen do much to the stutter, the car is running well except for that annoying cough,stumble, stutter.