Update from at 3.25pm: West Midlands Fire Service (WMFS)
The fire appears to have started in a storage area, but the cause is still unkown and will be investigated.
There were 29 staff on site at the time, all of whom were evacuated, none of whom was hurt.
Current resources on site: approx 75 firefighters; 13 fire engines; 2 Brigade Response Vehicles; 2 hydraulic aerial platforms; 1 high volume pumping unit drawing water from a local canal.
Good progress is being made and the fire is being brought under control.
People in the immediate area and east of the site are asked to keep doors and windows closed as a precaution.
At 1.17pm today (Wed 29 April) West Midlands Fire Service (WMFS) received a 999 call reporting a large fire at a plastics factory on Tat Bank Road in the Langley area of Oldbury.
WMFS currently have 12 fire engines and two hydraulic aerial platforms and around 70 firefighters in attendance.
Tat Bank Road is closed, and people in the area are advised to stay indoors and keep windows and doors shut.
A spokesperson for West Midlands Fire Service said: “This is a severe fire in a single storey plastics factory, measuring around 80m by 40m. All of the roof is on fire. All of the emergency services are at the scene.”
Further updates will be issued via @WestMidsFire on Twitter.