An encampment of travellers has converged on an open space near an airport, factory and fire station. About 20 caravans and as many vehicles have pitched up on land off Marconi Way near BAE Systems and Rochester Airfield on Maidstone Road. A resident who did not want to be named, said: “They are spread out over two bits of land. “They were putting up washing lines and picnic tables. They are between the car park behind the fire station and the children’s playground. A police spokesman said: “We were called at 8.43pm on Friday (August 2) to a report of an unlawful encampment on council land in …