sentences:  The runway and perimeter roads formed the original circuit until a new track was laid in 1968 utilizing the former airfield perimeter track At 2.356 miles (3.792 km), the new circuit uses only the perimeter road with the addition of a chicane called Club and a series of three tight corners called Campbell, Cobb and Seagrave.All of the loop and pan dispersal areas have been removed.There is no flying on race days but the airfield is used for flying during practice and test days on the motor circuit.