Exclusive Reversing Camera

I have just collected a 64 plate Exclusive which I was told didn't have a reversing camera.

I have noticed that there is actually a camera by the number plate but it doesn't seem to activate when I go into reverse.

Could anyone tell me whether a) I should have one on this model and b) how to make it work.

When I go into reverse I get the sensor display on the the screen but that's it.

Thanks