Cheers for the advice Dan, exactly what I was looking for!
I'd say it's no more pokey than my old Vectra DTI but easily reaches higher speeds. I've changed the fuel and air filters in the last 200 miles.
Not getting any fault codes (which I guess at least means there's nothing majorly wrong?)
Nope, no whooshing noises, but the slight judder right where I'd expect the turbo to be kicking in is curious...
I've changed the hose going from the inter cooler to the EGR valve and the one from the air box to the turbo as both were split... Are there any other hoses I should check??
The EGR valve has the electrical connection so blanking it isn't really an option... Though I have replaced it as it was sticking

Cheers Dan