Weird C-Max popped bumper problem

[pixelprime]

So I have a really odd problem with the front bumper on my C-Max. I think this may have happened as a result of someone slowly reversing into my front wing, but can't be sure. As you'll see from the pictures, the very top corner of the bumper has 'popped out' somehow, just under the driver-side headlight unit. It looks like there's some kind of plastic clip attached to the inner part of this piece of bodywork (you can see it peeking out in the photos), but I'm not sure if this is the attachment point or not. Is this something that's easy to clip back into place? I've tried pushing it back it, but it doesn't seem to be connected in this way, so maybe I have to take something else off to put this back on properly?

Any advice would be really welcome, thanks!