Hi, thank you for your response. I just started searching brown and white tile images, I added wheat in the search on Google. I was surprised when I saw your picture of it. There is also an image of the tile on a site in the UK, describing it as gothic/aesthetic print, circa 1885 and fleur de lys style. Unmarked similar to Minton/ Campbells.
Glad you like my chair, it has been sympathetically restored by my husband and is much loved.