The London Welsh School (Welsh: Ysgol Gymraeg Llundain) is a Welsh medium primary school in London, England. Welsh is the language predominantly used for all classes and activities. The school offers a bilingual education to children aged four to 11. The school also has a pre-school class for three and four-year-old children, and a baby and toddler group called Miri Mawr that meets on Friday mornings.