Actually it is a solid piece of wood with an expansion bolt into the wall. Most hardware stores in the UK have them. I found these online:
http://www.ironmongerydirect.co.uk/products/shelving_and_storage/shelving_brackets/96203/ion_floating_shelf_support/791796?vat=1&shopping=true&gclid=CLXJkdPr1soCFQYTwwoduBcKCQ&gclsrc=aw.ds
They will do the job.
Q
These are great shelves that float
Q