Secret SAS diary published to mark 70th anniversary

A secret World War II diary of the British special forces unit, the SAS, is being published for the first time.

The diary is being published to mark the 70th anniversary of the regiment.

Since being created in 1946, the exploits of the Special Air Service had previously been kept hidden.

The BBC's Robert Hall reports on this remarkable piece of history.

Archive footage courtesy of Imperial War Museum

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