Mountbatten

These days we use radar to help us park our cars, but during the early years of the second world war it was white hot technology and a closely guarded military secret. First used to detect aircraft in 1935, within a few years it had helped win the Battle of Britain and sink the Bismarck. It was so secret that work on it was forbidden even to physicists of genius who had fled the Nazis. (In the event, this freed up two such émigrés, Rudolf Peierls and Otto Frisch, to prove the viability of the atom bomb and thus kick-start what became the Manhattan Project.) Intelligence about what the enemy

In my mother’s final days we had a long conversation about the second world war. I asked if she’d ever thought we might lose. ‘No,’ she snapped. ‘I knew we were too clever for them.’ The chief of the imperial general staff, Sir Alan Brooke, had been less sanguine. On 31 March 1942 he confided to his diary: ‘During the last fortnight I have had, for the first time since the war started, a growing conviction that we are going to lose.’ His concern, besides the army not fighting very well — witness Hong Kong and Singapore — was that Britain’s new allies, the Soviet Union and the United States,

In carefree days which now seem so distant we used occasionally to take the Newhaven-Dieppe ferry. Docking after a long lunch, I would try to imagine the port during the infamous Dieppe Raid of August 1942. It is so clearly a natural defensive position that I could never work out how they expected to take it or, more importantly, why. This book sets out to answer both questions and, thanks to the release of previously classified wartime files, largely succeeds. It also throws new light on Ian Fleming, who was there. Dieppe in those days was intensively fortified by the Germans, flanked by heavy guns on the cliffs. Just about