Yes, you can sleep in the terminal at London Gatwick Airport (LGW), as both the North and South terminals remain open 24 hours a day. The South Terminal is generally considered the more comfortable of the two for sleeping, as it features wider benches and more services that remain open overnight, such as the 24-hour Tesco Express. Security staff typically patrol during the early morning hours and may ask to see a boarding pass to ensure you are a legitimate traveler. For those who want a proper bed without leaving the airport, YOTELAIR in the South Terminal offers "capsule" style cabins that can be booked by the hour. If you are sleeping in the public areas, it is highly recommended to bring an eye mask, earplugs, and a light blanket, as the terminals are brightly lit and can become quite chilly at night.