Rupert Wingfield-Hayes gets a furious reception when he approaches Chinese-controlled reefs in the disputed South China Sea, in a light aircraft.

But they are not alone.

Here, a response from an Australian pilot flying nearby is captured:

"China Navy, China Navy," the voice says. "We are an Australian aircraft exercising international freedom of navigation rights, in international airspace in accordance with the international civil aviation convention, and the united nations convention of the law of the sea - over."