Heads up reading early AI radar
Wing Commander Bob Braham's 'Scramble' succinct on Early Blenheim/Beaufighter NF ops
Dr Alfred Price's 'Instruments of Darkness' develops the theme
Professor R.V jones as usual nails the trail in his 'Most Secret War'
Our admirals never did apologise to the RAF as thy knew all about German gun laying frequencies after the battle of the River Plate in 1939