From Gloucestershire Constabulary:
We are currently dealing with a large diesel spill on the A417 from the Air Balloon Roundabout down to Cirencester.
Our Highways England colleagues are en-route and road closures have been put into place.
Motorists are asked to please avoid the A417 from Shurdington to the Air Balloon Roundabout, and down to Cirencester.
Thank you in advance for your co-operation.