At Maidstone we took the A274 towards Headcorn and Tenterden.
About 0.6 miles (1 km) after you have passed Headcorn there is a road to the left leading to the airfield. The airfield is on the LHS of this road.
The beacon is at the back of the airport. The best place to make a picture you reach by walking along the hangar front near the Lashendon Air Warfare Museum.
At the corner of the hangar you can make a good picture by using a tele lens.
Ask permission to go to that place!