Ok, that makes sense, i did wonder whether it was sitting proud or not. It was difficult to work out what it should look like or how it should fit! The previous owner just had it shoved in the garage so I didn't really have anything to go off and I totally agree it looks awful without it fitted!can only think that maybe the top surface of the fold out rack is sitting prominently higher (than it maybe should), on the lower part. The two should be level when put together. Other than that, I can't see why it's not closing properly, even without the original retainers.
When closed, the rack should sit flush with the rest of the rear bodywork.
Cheers,
Jock.
Thanks again for you help