IMHO your indie is offering good advice

As a follow-up to my original post, and as often happens, the problem was probably due to Pilot Error.
I finally got around to looking at the EGR valves with the Gapiid tool and the readings are where they should be.
My car is a mono turbo and the only profile I could get to work for DPF regens with the Kot Kit was the Jaguar F Pace, which is probably twin turbo. So a case of wrong profile. Not sure why the icarsoft gives the same erroneous readings but all's well that ends well......for the minute.
I almost got into changing EGR valves unnecessarily through a Schoolboy error.
Never too old to learn.

@Spridget:
Brave of you to admit the misjudgement, however also very useful to hopefully prevent some othe poor soul coming along and dismantling or replacing stuff that didn’t need it, so good on you!

BTW, you have the same model as me: Vogue, mono turbo V6.
At first, I was a bit dismayed to have the “poor relation” L405, however have come to realise that there is far less to go wrong with these cars, and it may be a blessing in disguise.
So far, 3 years and not a single fault. (Put my size 9 in it now, probs! ) V6 Vogue - “Less is More” - less to go wrong!