Forces News documentary 'Fast Jets and Long Lenses' takes a look at low-level training on the Mach Loop through the eyes of the photographers who climb mountains to capture it.
Almost every day of the year, state-of-the-art aircraft tear down the narrow valleys of southern Snowdonia as pilots hone their skills in some of Britain’s most challenging terrain. Presenter Will Inglis had this to say:
"There is nothing more awe-inspiring than a fast jet screaming past beneath your feet, to spend time on the Mach Loop with some of the best photographers out there was an incredible privilege."
The Mach Loop is a circular network of valleys lying between Dolgellau and Machynlleth, from where it takes its name.
Known by the US Air Force as The Roundabout, it provides aircrew with an unrivalled opportunity for six or seven minutes of uninterrupted high-speed low flying through steep valleys.
While making 'Fast Jets and Long Lenses', Will was trained to negotiate the Mach Loop in a Typhoon simulator.
He said: "The adrenaline rush was unbelievable.
"I have driven some quick cars on some of the world’s most challenging race tracks, but this was something else.
"The sheer power of the Typhoon and its unbelievable manoeuvrability made it a dream for even a rank amateur like me to fly."
There is a competitive element to the challenge too, pitting Will’s best time against the likes of James May, Carol Vorderman and even professional RAF and BAE Systems test pilots.
Find out how he gets on and watch incredible footage of real planes flying jaw-droppingly low and fast down the valleys of North Wales in 'Fast Jets and Long Lenses'.