Hi, Rather than spend a lot of time paying money to Land Rover workshops who (according to anecdotal evidence posted in this forum) don't know much about their product, here are some things to check.
Battery connectors, including earths, fuse connectors, HDC switch wiring, speedo connector etc.
Check connectors to each wheel speed sensor. Each time you start your car and drive the ABS TC etc runs a self check and makes sure it's receiving a signal from each speed sensor.
Check the sensor rings, make sure they're not dirty or cracked.
Hope this helps. Let me know how you go.