I know I updating an old post but my LRDS 2017 had the same issue of leaking exhaust to turbo gasket. This is fully known by Land Rover and it was due to outsourcing of the manufacturing of the parts. A new exhaust catalyst pipe to Turbo is required, this was £900 on the job sheet. You can tell it is leaking because the inside of the turbo shield is covered in carbon. Very easy to remove this shield with only a couple of screws. Turbo is mounted at back of engine at just under bonnet at the back. so a 5 minute job just to check it is leaking.
Neil - Burgess Hill, England, UK