I found these guys out of Cornwall and sent them an email. Would be ideal if they have a way to apply their tune with a tool that the user could keep to re-flash and update, as necessary. Certainly speaks to what a good tune can do, (I'm not interested in all-out max tunes at peak ranges that I don't want to go and may do more harm than good.)

CelticTuning Land Rover Disco V Td6 and Sd6 tuning

 

Try velocity AP. They are extensively used in the Jag forum on f types etc with the same core engines. Folks are v pleased with the results. You can upload at home, revert back to old oem tune before a service etc
They do LR too
Look at jaguarforums for more info. They are a sponsor too.

 

I have to say in my vehicle I don’t know if the time really did much. There’s really not much turbo lag on these diesels