I've had a call from Jaguar Land Rover recommending that all four discs need replacing. I only purchased the car nine months ago.
I agree the pads at 3mm require replacing, but It's hard to tell from the video whether the discs need replacing.
Do they need replacing, or are they trying to get more money out of the service?
Here's the video they have sent https://youtu.be/Zwrw4DPcBYo.