A World War II air raid shelter was discovered during work to extend Norton Knatchbull School in Ashford. The shelter is of the single corridor type on an L-shaped plan and could hold approximately 100 teachers and children. There is one staircase entrance and two vertical escape hatches at either extremity of the corridor. At the foot of the entrance staircase is a single toilet chamber. An airlock to protect from gas attacks is now rotted away.