The air raid sirens had already wailed twice that night when the third wave of Heinkel He 111s crossed the Cambridgeshire fens at 2:47 AM.

The Day the Luftwaffe Tried to Burn Cambridge

When German Bombers Targeted Britain's Ancient University—and Missed

German bombers targeting Cambridge's historic university were fooled by decoy fires and missed—but still killed seven evacuees.

The air raid sirens had already wailed twice that night when the third wave of Heinkel He 111s crossed the Cambridgeshire fens at 2:47 AM on October 1, 1940. Below them, in the enforced blackout, King's College Chapel stood invisible—its medieval stained glass windows already removed and hidden in the cellars of a secret location in Wales. The German pilots, guided by fires still burning from earlier raids on London, had been ordered to strike at the heart of British intellectual life.

But the Luftwaffe's navigators made a critical error. Confused by decoy fires lit by British deception units in the surrounding farmland, the lead bombardier released his payload two miles east of the city center. The bombs fell instead on the village of Cherry Hinton, destroying three houses and killing seven civilians—including a family of five who had evacuated from London just three weeks earlier, seeking safety in the countryside.

Inside the Cavendish Laboratory, where Chadwick had discovered the neutron eight years prior, physicist John Cockcroft crouched beneath his desk as the building shook. He was working on classified radar research that would later prove decisive in the Battle of Britai…

💡 King's College Chapel's irreplaceable medieval stained glass had been secretly removed pane by pane in 1939 and hidden in a Welsh quarry, where it remained until 1946.