My research suggests that earlier models, with a VIN number where the 10th digit is a 6 or less, can be completely blanked off Peter. The later VIN numbers are likely to cause a permanent MIL light on.
I'm waiting for a couple of replies regarding whether the Land Rover and Jaguar versions of the engine will both have the same digit at position 10.
I never have liked EGR valves and I'm of the opinion, that the reduction in EGT, in an attempt to reduce the NOx output, pretty much a political knee jerk reaction, has rebound effects by increasing other pollutants, notably, unburnt hydrocarbons.
I removed the EGR completely in both of my Rover 75s and it was well worthwhile. In fact, in the later one, a pipe of roughly 55mm internal diameter had been reduced to a size that a pencil wouldn't go through.
As an aside, I've just learned how to completely remove my air filter lid. What a right royal PITA that is, until you get the lid off for the first time and realise how easy it would have been had you known then what you know now... so to speak.
I was chuffed to see the inside of the air filter housing as clean as a whistle as well, having heard horror stories of the amount of debris to be expected inside.
So Wynn's EGR cleaner tomorrow afternoon, I think, when I can convince SWMBO to be the S Type pilot and keep the throttle in a fixed position.
If that has a noticeable effect then so be it, but I will probably go for the EGR removal if research suggests that my VIN number will allow.
When the old girl gets the wind in her sails she fairly flies, but at low revs, she is just a tad less responsive than I'd like :)
And... isn't it wonderful to be paying less for diesel than others are paying for petrol