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Battle of Britain: The schoolgirl who helped design the Spitfire – BBC News

Meet the young mathematician who helped design the Spitfire, the iconic aircraft that took part in the Battle of Britain, which started 80 years ago.

Hazel Hill helped her father do the calculations that meant Spitfires could be built with eight guns instead of four. Many believe this made a big difference to the outcome of the Battle of Britain.

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