I don't believe Amy Johnson ever flew Gipsy Moth G-AABN. This was Sn 802 which crashed in Stanmore, Middlesex in June 1931. Amy Johnson's Gipsy Moth is G-AAAH Sn 804 which she flew from England to Darwin in 1930. The aeroplane can be seen in the Science Museum in London. I didn't see the programme and can only assume the BBC found some old footage of AABN which they thought would illustrate the type of aeroplane Amy flew. I don't know who that is in the cockpit but I don't believe it's Amy.
The C.A. Form 113 which was handwritten and is on the GINFO site appears to be an error made back in 1929!
Regards
Rob