Mighty Oats are a 'Force for Nature' It all started with William Lea almost 350 years ago, when mother nature provided power to turn our first mill stone. 15 generations later she's still powering our mill. Mighty Oats are still milled by James & Edward Lea using the positive power of nature. We work together with our farmers to make sure we leave our planet a better place for future generations. Low Food Miles All of our oats are grown in Britain. We don't import any oats for our Mornflake Mighty Oats. Why would we when the UK growing conditions mean we have the best oats in the world?