Contrary to what was said in the programme, according to Wikipedia (so it must be true
) the US trials of
Highball were not post-war; the first A-26 was converted by Vickers in January 1945 and the tests were carried out over Choctawhatchee Bay near Eglin Field, Florida where the unfortunate aircraft, A-26C-25-DT 43-22644, crashed fatally on 28 April 1945, thus ending the programme.