Thanks for all input guys , I am getting the new egr fitted and I'll give it all a good clean.
Cheers Trevor i might put a blanking plate on whist I'm at it as it's the CFF engine and apparently hard work to get at so might aswell whilst Im back there.
Mo sounds good 215 but I need to be 100% on the MOT side of things before I start opening up can of DpF I think. 🙃
A spare hollow'd out Dpf for running wouldn't go amiss and keep the stock one for test or like Dan said about a aftermarket system just in case.