I love those long floorboards/wood-look tiles and they are the feature so you wouldn't want something too busy on the walls... personally I would go with a larger format say 300x600 rectified edge white tile with a matt finish for the Hamptons look... what's your vanity?... a timber one would tie in nicely with the floors and all the white... very Hamptons :)

also will give illusion of a bigger bathroom if you use bigger tiles ..I used small ones on one wall as feature wall and larger ones on other walls ..

Hi Sue, I love oklouise ‘s and JE C’s ideas, also your tiles are fab, I think you could love them, try adding some gorgeous items to the bathroom that will give it a really stylish look, could look fabulous

This with the extra width you suggested the built in bath with a large shower space next to, the shower head coming off the opposite wall to help avoid water to window, the window would be best tiled, the wall with the shower door into "The wet room could be all glass up to the vanity. There are several suitable places for towel hanging and an extra storage cabinet could be above the toilet, I forgot to add this