It was made by Hollinshead and Kirkham who were otherwise known as the Unicorn Pottery. They were based in Tunstall after 1876. The word Davenport refers to the name of the pattern. The mark that appears on your earthenware dates it between 1900 and 1924. The colour combination of blue, iron red, a dash of green and gold is a colour combination utilised extensively at this time by several British pottery manufactures. It appears most commonly on earthenware intended for everyday use although occasionally one may find it used on bone china.
I love that this china was intended for every day use! Of course it won't go in the dishwasher, but I'd like to use it at least once a week. I've also been directed to a place that makes replacements. Awesome!