These are the amazing scenes as USAF F-15E Strike Eagles were seen flying through the Mach Loop in north Wales earlier today.

The all-weather fighters were training in the area where pilots are entitled to drop to as low as 250 feet as they twist and turn through the mountains.

The area is popular with plane spotters who can climb to the top of a hill and watch the fighter jets and attack helicopters blast through the valley below.

The Royal Air Force regularly use the Mach Loop, as do other Nato countries.

Military pilots need to learn to fly low in order to avoid enemy radar if ever faced with flying in a combat zone. By flying low, they are able to mask their aircraft using the terrain.