A no-fly zone is in operation in the skies over Burnham-On-Sea this week during a three-day Nato summit when leaders from around the world are meeting in Wales.
The no-fly zone stretches for a wide area around Cardiff to prevent light aircraft flying over the area below 10,000 ft (3,048 m).
The Civil Aviation Authority (CAA) has imposed the restriction following a request from police working on security at the Nato meeting.
Over 60 heads of state and government leaders from across the globe are attending the event including President Barak Obama.
In an advisory sent out to pilots, the CAA says the restriction is part of the security operation being put in place to protect heads of state.
Unauthorised aircraft will not be able to fly over the area on the dates shown above. Flights which breach the ban will be intercepted by police air support.
The ban will not affect emergency services or commercial flights travelling to and from Cardiff and Bristol airports.