Six fire engines and crews from Milton Keynes and Bedfordshire, as well as a Turntable ladder and crew, and four officers, are currently dealing with a fire in a single-storey recycling unit in Newton Leys, Bletchley.
The incident is generating multiple calls to Thames Valley Fire Control Service, with a large volume of smoke visible in the surrounding areas.
Firefighters are using main jets and water delivered by the turntable ladder. They are also using positive pressure ventilation fans.
Advice to local residents is to keep doors and windows closed and be prepared for the potential of disruption and smoke affecting visibility on local roads, while the emergency services are working at the scene.
The incident response started to be scaled back around 10:30am. Firefighters remain on site dampening down and checking for hotspots using the thermal imaging camera.
The building is around 80 per cent damaged by fire and 100 per cent damaged by smoke.