According to this page, 250 feet: https://www.gov.uk/low-flying-in-your-area https://www.gov.uk/low-flying-in-your-area ”Low flying isn’t usually allowed in a

According to this page, 250 feet: https://www.gov.uk/low-flying-in-your-area https://www.gov.uk/low-flying-in-your-area ”Low flying isn’t usually allowed in areas around airports, or towns and cities with populations of more than 10,000.”