Surrey
Surrey's most significant source of prosperity in the later Middle Ages was the production of woollen cloth, which emerged during that period as England's main export industry. The county was an early centre of English textile manufacturing, benefiting from the presence of deposits of fuller's earth, the rare mineral composite important in the process of finishing cloth, around Reigate and Nutfield. The industry in Surrey was focused on Guildford, which gave its name to a variety of cloth, "gilforte", which was exported widely across Europe and the Middle East and imitated by manufacturers elsewhere in Europe. However, as the English cloth industry expanded, Surrey was outstripped by other growing regions of production.
Though Surrey was not the scene of serious fighting in the various rebellions and civil wars of the period, armies from Kent heading for London via Southwark passed through what were then the extreme north-eastern fringes of Surrey during the Peasants' Revolt of 1381 and Cade's Rebellion in 1450, and at various stages of the Wars of the Roses in 1460, 1469 and 1471. The upheaval of 1381 also involved widespread local unrest in Surrey, as was the case all across south-eastern England, and some recruits from Surrey joined the Kentish rebel army.
North East England
The coal and shipbuilding industry that once dominated the North East suffered a marked decline during the second half of the 20th century. Tyneside is now re-inventing itself as an international centre of art, culture and through The Centre For Life, scientific research, especially in healthcare and biotechnology. Newcastle University is now a leading institution in the development of stem cell technology being the first in the United Kingdom and the second institution in Europe to obtain a licence to do such work. As with the rest of the region, Sunderland suffered economic decline during the last century, but is now becoming an important area for quaternary industry, bioscience, computing and high tech industries. The economy of Sunderland is now dominated by the Nissan's European car manufacturing facility and supply chain which is also leading that company's development of electric vehicles. The economy of Teesside continues to be largely based on the petrochemical, commodity chemical and steel industries that form a significant part of the Northeast of England Process Industry Cluster (NEPIC), but newer industries such as offshore engineering and digital computing, particularly in the field of Game design, have emerged from Teesside University. Northumberland, although largely rural and an important tourist location with its castles, beaches, and history has a nationally significant concentration of pharmaceutical manufacturing companies around Cramlington and Prudhoe. The county has also seen a huge investment into the creation of the UKs largest reservoir, Kielder Water, enabling the Northeast to attract more industry. Kielder forest around the reservoir is known to have the darkest night sky in England, making it an ideal location for both professional and amateur astronomers. The City of Durham with its highly regarded University, Castle and Cathedral attracts many tourists and also a significant number of knowledge intensive businesses (KIBS) in architecture, engineering, technology and measurement science. At Sedgefield in County Durham, Netpark is home to the Centre for Process Innovation's Printable Electronics Technology Centre, a nationally important centre for the development of printed electronics and a number of other emerging electronics companies such as Kromek.