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Thanks for the prompt response - I'll look into this now and report back So think I've got it but would be hugely grateful for guidance: http://www.baytree-interiors.co.uk/1130/interior-accessories/candle-holders.html this URL and the same appended with ?stock=&price=&order=&records=1 has been correctly flagged as having duplicate content. As these pages display multiple product are canonical tags the best thing or are they best for specific products? Feel ignorant but learning loads here thanks