Whats Behind the bumper- passenger side?

I've just replaced my plates for stamped ones. In doing do so I've found some accident damage that was hidden by the reg plate. (Nice of the dealer to tell me about it, they would have seen it while placing on there own branded plates)
So I've now I've got a ruddy great 8" crack that extends down under the license plate recess. Thats not the worrying issue, after closer inspection something appears to be lose behind and under the bottom grill (More on the passengers side of the front). I can move what ever it is up and down a few inches.

What is it likely to be? The weather isnt too great atm otherwise I'd be taking off the bumper this weekend to find out. :001_unsure:
 
Cheers Foxspeed
Is there anything behind the impact bar?

From just that picture is doesn't look like anything important.
 
Cheers Foxspeed
Is there anything behind the impact bar?

From just that picture is doesn't look like anything important.

front chassis legs / radiator / air-con condenser / radiator shrouding