Residents living close to the Perkins site in Peterborough are being urged to stay indoors while a controlled explosion is carried out on an unstable chemical.
The alert was raised at 1:30 this morning and staff were evacuated. A 500 metre cordon has been put up around the area. The controlled explosion is due to happen in the next half hour.
More top news
Showers will ease this evening, taking us into a dry night ahead. Generally dry with sunny spells to start tomorrow. Cloud increasing later
The Clacton MP Douglas Carswell was booed during PMQs today as he tried to thank the Prime Minister.
Essex MP John Baron and South Northamptonshire's Andrea Leadsom could both put their names forward to be the next leader of the Tory party.