If I'am right they are spec'd as a wall and floor tile - floor tile usage for no shoe traffic ie bathroom. However as a tile fixer I believe that moisture will get down the side of the grout line and seep into the biscuit and ultimately stain the tile from the edges.
The wall tile biscuit that it's produced from is white and very dry. Extremely light in weight and the soft glaze has a number of imperfections ranging from pin heads to patches of missing glaze on edges. As many as 2 tiles per metre is the norm. These can of course be used for cuts but it's 10-15% wastage.
The first time we were required to fit these tiles I asked for confirmation from the Tile Distributor supplying them that they were indeed suitable for floors. To the client I insisted the only way we were prepared to undertake this work was on top of Ditra mat and 7 years later no comeback.
I would refuse to fix these tiles to any boarded substrate without a crack membrane being used.
In my opinion they are a wall tile, totally unsuitable for wet areas and floors and of extremely poor manufacture bordering on unfit for purpose.
This of course my own personal view of a range of ceramic tiles produced by BCT.
