M1 closure caused by 'highly corrosive' substance

Thames Valley Police are appealing for information after a highly corrosive substance was left on the M1. Credit: ITV News.

Thames Valley Police are appealing for information after a highly corrosive substance was left on the M1 near Newport Pagnell forcing the closure of the road for most of yesterday.

Hundreds of cars and lorries were trapped on the motorway while the bomb squad investigated a container filled with acid-like liquid found under a bridge.

There is no suggestion the incident was terrorist related but the police want to know how it got there.

They said: