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Hello. Hello and welcome to the History Extra podcast from BBC History Magazine, Britain's best-selling history magazine.

I'm Ellie Cawthorne.

In 1939, a colourful cast of curators, museum directors and civil servants embarked on a top-secret mission mission to protect Britain's national art collections from the Nazi threat.

It's a story that Caroline Shenton examines in her new book, National Treasures.

And she joined Emily Briffitt on the podcast to explain how these dedicated men and women devised ingenious escape plans and hid artworks in the most unlikely of places in a race against time to save the

nation's heritage. So hello to you Caroline. Thank you so much for joining us today. Thank you very much

for having me. Today we are going to be talking about your new book National Treasures, which

follows the story of the Operation to Protect the British Nations Art and artefacts during the Second World War,

and also the story of the people behind it.

So I wanted to start by asking you, how did you get into researching this topic?

Well, I'm professionally an archivist, and I started my first job at the Public Record Office in Chancey Lane in the early 1990s.

Today, that's the National Archives and it's moved

to Q. But then I was in this enormous building, this enormous treasure house in central London,

and I heard the most amazing story about what had happened to Doomsday Book in the Second World War,

which was that it was evacuated from London in the days before the war

...