Hey, sorry for the late response (didn't see the email notification!). Thanks for the reply but unfortunately it doesn't seem to be working still.
Just to clarify, It's a wireless Xbox One controller (connected through wireless dongle), I start the game up (with the controller already connected), use the keyboard in menu to select Settings->Input->Select controller->XBOX One S controller #1 but there's no response. I can see that the buttons are assigned there too. I wonder if the fact that it's wireless (not bluetooth) makes a difference?
Anyway, thanks again for the reply :)