10 appliances and crew from across Buckinghamshire, Oxfordshire and Royal Berkshire along with three officers are in attendance at fire in a scrap yard.
Firefighters are using three main jets and water shuttle to contain and extinguish the fire.
Incident update 20.52
The fire has affected a workshop and scrapyard which included cylinders of unknown chemicals and fuels. Staff on site have confirmed no acetylene on the premises. Firefighters are now dampening down the area using three main jets and water shuttle.