Dozens of firefighters are tackling the blaze at Intapart Ltd on London Road after it started this evening (Monday, August 3).
Residents have been asked to close their windows and the A45 has reopened after being closed between the new roundabout at Weedon and Stefan Way roundabout in Daventry.
Here are a selection of pictures of the fire posted on social media with permission from the owners. Read the full story here.
Intapart fire. Photo: Sammy Carr
Intapart fire. Photo: Rob Smith
Intapart fire. Photo: Judy Mansfield
Intapart fire. Photo: Ryan Jordan