It appears the 'documentary' was commissioned by National Geographic.
This from the Inmarsat website.
There are few period pictures and movie records of the early flights of the 1920 and 30s, so filming her journey will not only help keep history alive but footage also will be used to educate a new generation of aviation enthusiasts. In this way Tracey hopes to provide young people with an enthralling example of adventure that reflects the great achievements of our pioneering forebears.
Footage from the cameraman, as well as from the cockpit and wings of Tracey’s biplane, has captured stunning shots of the scenery, the challenges and moments of high emotion. This will now be pieced together in a documentary made by Leopard Films and commissioned by National Geographic, to pay homage to Amy Johnson.
I am not sure who writes all this stuff.
She has been flying for many years; taking her first lesson at the age 16 and learning to fly in New Zealand after emigrating there in her early twenties. Later Tracey returned to the UK and became a commercial pilot and a flying instructor.
But her real passion was for vintage aircraft and warbirds. In 1997 she helped organise Duxford’s Flying Legends air shows and later became the first female pilot to be based at the historic Shuttleworth Collection, at Biggleswade in Bedfordshire.
Today she lives in Cambridge, UK, working predominantly with historic aviation and air show organisation.
Journey into history - Inmarsat