The fire at the Riverside Industrial Estate caused a cloud of black smoke and traffic delays. Work by County Durham and Darlington Fire and Rescue, and the Environment Agency, has meant that the impact on the surrounding environment has been minimal.
A 54 year-old man has been arrested on suspicion of arson following a fire in Langley Park.
He is currently in custody assisting police with their enquiries.
Emergency Services remain at the scene of the fire in Riverside Industrial Estate which is still alight. The public are reminded to stay away from the area and to also take care driving in the vicinity of the fire as there is still a significant amount of black smoke decreasing visibility.
Pictures are emerging of a fire at a building near Langley park in County Durham. More on this as it comes in.
We have been covering the remarkable story of the little village that got a visit from Royalty today, and just because they asked.
When volunteers were fixing up the garden at Langley Park Primary in County Durham, they decided to aim high in trying to get someone to officially open it - and it worked.
You can watch the full report from Gregg Easteal below.
The Duke of Edinburgh declared himself to be "the world's most experienced plaque unveiler" as he officially opened a school garden in County Durham.
Prince Philip made the trip to Langley Park Primary School in County Durham by helicopter and was greeted by cheering children and parents.
The Duke came to open the school's Royal Garden, which has been completed by pupils and volunteers.
After being given a tour he was asked to unveil a plaque, and turned to the children and said:
He was also presented with a book compiled by the children as well as a lamp, which he said would be useful to him in the dark.
The visit was arranged after a teacher at the school wrote to the Duke and asked if he would visit.