the Anglian kingdom of Northumbria. Most of modern-day Cumbria was a principality in the Kingdom of Scotland at the time of the Norman conquest of England in 1066 and thus was excluded from the Domesday Book survey of 1086. In 1092 the region was invaded by William II and incorporated into England. Nevertheless, the region was dominated by the many Anglo-Scottish Wars of the latter Middle Ages and early modern period and the associated Border Reivers who exploited the dynamic political situation of the region. There were at least three sieges of Carlisle fought between England and Scotland, and two further sieges during the Jacobite risings. After the Jacobite Risings of the 18th century, Cumbria became a more stable place and, as in the rest of Northern England, the Industrial Revolution caused a large growth in urban populations. In particular, the west coast towns of Workington, Millom and Barrow-in-Furness saw large iron and steel mills develop, with Barrow also developing a significant shipbuilding industry. Kendal, Keswick and Carlisle all became mill towns, with textiles, pencils and biscuits among the products manufactured in the region. The early 19th century saw the county gain fame when the Lake Poets and other artists of the Romantic movement, such as William Wordsworth and Samuel Taylor Coleridge, lived among, and were inspired by, the lakes and mountains of the region. Later, the children's writer Beatrix Potter also wrote in the region and became a major landowner, granting much of her property to the National Trust on her death. In turn, the large amount of land owned by the National Trust assisted in the formation in 1951 of the Lake District National Park, which remains the largest National Park in England and has come to dominate the identity and economy of the county. The Windscale fire of 10 October 1957 was the worst nuclear accident in Great Britain's history. The county of Cumbria was created in 1974 from the traditional counties of Cumberland and Westmorland, the Cumberland County Borough of Carlisle, along with the North Lonsdale or Furness part of Lancashire, usually referred to as "Lancashire North of the Sands", (including the county borough of Barrow-in-Furness) and, from the West Riding of Yorkshire, the Sedbergh Rural District. It is governed by Cumbria County Council. On 2 June 2010, taxi driver Derrick Bird killed 12 people and injured 11 others in a shooting spree that spanned over