I think the reason I cant find a standard answer is that my question is stupid.
Google Searching for ‘unreal engine swap player contols’ results in many topics not related to my goal, but in every game the player swaps controls when going from a main menu > Gameplay > Pause/Options menu.
I know that ultimately there is a conflict between the UE_ThirdPersonBP setup and the Asset_VehicleBP setup.
I will start at the beginning and create a vehicle from scratch by following various tutorials, I’m sure at some point the answer will become obvious to me and I will be able to modify the asset.
Thanks for your assistance