My tailgate looks open when it's shut if that makes sense

When driving over uneven road surfaces it's knocks and bangs which i originally thought was my rear beam. Is there anyway I can adjust this at all. If i look at the car side on i can clearly see the rubber stops, the rubber seal and the top of the rear lights oh and daylight

Any ideas guy?s many thanks.
________________________________________
Team Nile 6
Team: 40.2 MPG

5 x a 306 owner!
currently abusing type r's in a town near you ™

I truely live for the 306 ®
Build date: 29th October 1997 Wednesday's car
midweek madness
