Sorry I’ve clearly made a mistake in that there isn’t a skylight.
This project has a massive amount of maps in there, it really is a humongous file, I’m not sure of how to send on a single level?
Although the upshot is by disabling auto exposure the lighting is now ok, its still not perfect but not too bad.
Although, I’ve got a problem with motion blur that I’m also trying to fix:
https://forums.unrealengine.com/development-discussion/rendering/1453013-is-this-motion-blur
Nilson, I genuinely appreciate all your very kind help!