I have spent a few weeks sorting out this TV now and I am very happy with the settings. Thought I would share for anyone else with this TV.
Note you can make some additional colour changes and tweaks as there is a post on YouTube from AVForums for this.
The TV allows different settings for the same HDMI source according to whether the content is Standard or HDR. Just send an appropriate feed to adjust the settings.
Standard Settings (Non-HDR, TV, 1080p Settings)
Viewing Mode: Professional2
Luminance: 85
Contrast: 100
Brightness: 0
Colour: 50
Tint: 0
Sharpness: 0
Colour Temperature: Warm2
Vivid Colour: Off
Rec 2020 Colour Remaster: Max
Reversal Film Effect > Dynamic Range Remaster: All Off
Intelligent Frame Creation: Custom. Blur 3, Smooth 4
Clear Motion: Off
Advanced Settings
Contrast Control: Auto
Gamma: 2.4
Option Settings
Game Mode > 1080p Pixel...: All Off
HDR Settings
Viewing Mode (HDR): Professional2
Luminance: 100
Contrast: 100
Brightness: 0
Colour: 50
Tint: 0
Sharpness: 50
Colour Temperature: Warm2
Vivid Colour: Off
Rec 2020 Colour Remaster: Max
Reversal Film Effect > Dynamic Range Remaster: All Off
Intelligent Frame Creation: Custom. Blur 3, Smooth 4
Clear Motion: Off
Advanced Settings
Contrast Control: Custom Adaptive Gamma 8, Black Expander 5, Clear White Effect 5
Gamma: 2.3
Option Settings
Game Mode > 1080p Pixel...: All Off