Our recently-acquired XF S Sportbrake came with a tow hook fitted. It's Jaguar branded but one of the stickers underneath says it's made by Thule. It looks like it should be detachable and we have the removable section of the lower bumper valance in the boot of the car. For the life of me I can't seem to remove the hook itself. Did a bit of Google searching and found something that suggests that I need to insert and turn the key to unlock it, then push the handle on the right in towards the hook and rotate and then the hook should simply come away. I can only seem to rotate the handle downwards by maybe 20 degrees though and the hook still feels firmly attached. Anyone got any further advice?