Piece of Cake, truly good stuff, especialy the flight down the river in a spitfire at 'nought feet' and under the bridge, the mass takoff's, and the general filming.
I dont know if anyone has seen the telly movie"Half a world Away", story of the 1930's Mc'Robinson Airrace from London to Melbourne, the eventual winners being Campbell/Black in the DH Comet.
A 'few' miss represented aircraft, Harved as G-B racer, Anson as Boeing 262, Stearman as 1930's Fairy, DC3 as DC2, but had several well made full size replica DH88 ground running aircraft.
Except for the above , the film is worth a look if you can find it, at your local video shop, always assuming it was released to gp
1946.