Where horizontal and vertical meet should not be grouted because it needs something flexible, something we learned the hard way, twice, in different houses. Make sure your tiler redoes the waterproofing properly too.

I suspect that you may find that they are difficult to remove as single tiles. Maybe consider a crazy, random pave pattern for your bathroom floor made up of broken slate tiles? Similar to this photo but on the floor: Make sure you have a suitable waterproof membrane underneath to comply with the Australian Standards and you will have a lot more grout between the slate than a traditional square tile pattern. Best of luck, Dr Retro of Dr Retro House Calls

If you're wanting to recolour tile do NOT do this yourself. If that's the way you want to go get the pro's in. They do not use paint, they use an acrylic resin and chemically etch the tile before hand. It is applied with a spray gun for a nice finish. It won't last forever but you will probably be satisfied with the results for long enough.

Hi Angel, because you’re only after one tile, it’d be worth a call to some of the companies that specialise in vintage / retro capping tiles as, unless they have large numbers, they often have stock not listed on the website. Alternatively, Schots have a very similar shaped tile, which they call a dado tile and tile paint is much improved, so that may also be an option. Good luck