A plumber is in hospital with Legionnaires' disease after working on a disused building at a city college. It is thought the man became infected with the potentially fatal bug while working at New College, in New Parks, Leicester. He is currently recovering in hospital and a colleague is also undergoing tests for the disease. Leicester City Council bosses said they were confident the disease was isolated to a disused building that staff and students have not had access to for about seven years. They said there was no risk to staff or students. Deb Watson, the city council's director of public health and health improvement, said that, as a precaution, water samples were being taken across the college site, the school's water system was being disinfected and showers were not being used. "We can confirm that a specialist contractor working in a disused building on the site of New College has become ill with Legionnaires' disease," she said. "The building, which is being decommissioned, is not accessed by staff or students and the water source thought to be affected was contained in a disconnected heating system. "We are confident that the Legionella is isolated to the disused building and there is no risk to staff or pupils, but as a precautionary measure water samples have been taken across the college site."