Loud explosions heard across the Cotswolds and North Wiltshire last night were part of pre-planned exercise at Cotswold Airport.
Small controlled explosions took place between 9pm and 10pm as part of a multi-agency exercise.
A spokesman for Gloucestershire Police said: “Please be reassured that this is a routine exercise and is designed to test and strengthen the national response to a terrorist incident.
“It is not in response to any recent intelligence or threat.”
A spokesman for the Cotswold Airport Team added: “This is a planned exercise at the airport.
“The police and specialist units are fully aware and will be around in force.”