Originally Posted by elphingirl
We used a tile snapper to cut the clean breaks in the tiles. It has a diamond blade that scores the top of the tile, and then a bar that applies pressure at exactly the right spot. You can hire them easily. For the picture above, that is always going to be a difficult cut. I would think about maybe phoning a tiler to see if they will cut it for you while they're out on site.
We also found drilling holes with a diamond bit in a circle to remove larger areas of tile, and then just neatening it up with a nibbler.
These were pocelain floor tiles too, so they were bloody hard to work with.