The Handley Page slot is a design feature found on some aircraft wings that enhances their aerodynamic performance. It consists of a gap between the wing's leading edge and the wing's slat, which allows for better airflow over the wing at high angles of attack. This improvement helps to delay airflow separation, reducing the risk of stalling and improving lift. This innovation was developed by the British aircraft manufacturer Handley Page in the early 20th century. The slot is particularly beneficial during takeoff and landing phases, where maintaining lift is crucial for safe operations. It is commonly used in various commercial and military aircraft designs.