A reproduction replacement Blue Plastic Interior part for the Matchbox Lesney 23c Trailer Caravan.
The photos show examples of the fitting. The model of the caravan is not included.
The interior fits and is meant to clip into the underside of the metal body but the reproduction clips are slightly different to an original and the interior can spring back out which lifts the roof. I recommend a drop or two of a two-part expoxy glue which will not damage the plastic but will adhere the interior to the body. Place a small amount under the rear deck area and peg it down while it sets. The roof should also be glued into place to make a nice finish.