Worcestershire schools in the county provide Sixth-form education including two in the city of Worcester. Several vocational colleges provide GCSE and A-level courses and adult education, such as South Worcestershire College, and an agricultural campus of Warwickshire College in Pershore. There is also the University of Worcester, which is located in the city itself and is home to the National Pollen and Aerobiology Research Unit and five other national research centres. The county town and only city is Worcester. The other major settlements, Kidderminster, Bromsgrove and Redditch are satellite towns of Birmingham. There are also several market towns: Malvern, Bewdley, Evesham,
Economics of English towns and trade in the Middle Ages included the "craft guilds", representing specific trades. By 1130 there were major weavers' guilds in six English towns, as well as a fullers guild in Winchester. Over the coming decades more guilds were created, often becoming increasingly involved in both local and national politics, although the guilds merchants were largely replaced by official groups established by new royal charters. The craft guilds required relatively stable markets and a relative equality of income and opportunity amongst their members to function effectively. By the 14th century these conditions were increasingly uncommon. The first strains were seen in London, where the old guild