With the exception of technical and security staff, the festival is mainly run by volunteers. Some 2,000 stewards are organised by the aid charity Oxfam. In return for their work at the festival Oxfam receive a donation, which in 2005 was £200,000. Medical facilities are provided by Festival Medical Services who have done so since 1979. The bars are organised by the Workers Beer Company, sponsored by Carlsberg (previously Budweiser), who recruit teams of volunteer staff from small charities and campaign groups. In return for their help, typically around 18 hours over the festival, volunteers are paid in free entry, transport and food, while their charities receive the wages the volunteers earn over the event.