Update:!! Sorted it, I removed the main hose from the egr valve, Removed the metal piece (With sensor) which seperates the rubber one, Sprayed all the pipes with Carb Cleaner, Also sprayed the Inlet with Car Cleaner, Wrapped an old lint free rag around the end of an old longish screwdriver and removed all the crud from in there (Alot of thick black sludge), Put all back together and started.
Loud knocking, and loads of blue smoke, which I am guessing was the cleaning spray working its way out, small amount of revs, left ticking over for 3-4 minutes and took round the block going from 1st-5th without hitting turbo, then went on the open road, and opened it up WOW!!! Back to how it should be, If not better, Response was amazing.

Just thought I would share with anyone that was interested!!