Passenger Door Wont Shut

Just popped to the shops, opened the passengers door to drop the shopping in the footwell, went to shut the door and it just bounced back open, tried several times still no good, currently held shut with the seat belt looped through the handle and clunk clicked into place.

Going to have some brekky now, then I will brave the elements and try to fiximicate it!!

Bloomy weather, hopefully