sorry, one more glitch. Same thing really on some products they have two codes the network rail reference and also a part code. Again they will want it to be able to search part code. I added those attributes on and reindexed but they don't appear in the search.
a search for LT/SB/640/LID
which should find this page http://www.lawtontools.co.uk/en/product/aluminium-storage-boxes/
Am I missing something?