Hi Silverdevil
Thanks for the reply the post on XrResult failure was the answer.
I checked what XR apps were installed and I found
XRNeck safer; Open XR toolkit, Leap motion, Dynamic Foveated Rendering Quad View and vjoy (for an extra Axis for spitfire brakes)
I uninstalled all of these and deleted any leftover registry keys, and the game launched in VR.
I have currently reinstalled Open XR toolkit and Necksafer, so far still launching in VR. I will install Leap motion and expect that to be ok. My thoughts are that it is an issue with either Vjoy or Dynamic Foveated Rendering Quad View, having noticed that this app is designed for the G2 Omnicept, which I dont have.
Thanks for the help, much appreciated
Cyber